Yes, you can install Mac OS on an external SSD. This process involves formatting the SSD, downloading the Mac OS installer, and running the OS Installer to the external SSD.
Installing Mac OS on an external SSD gives more flexibility and convenience.
It aids in easy transportation of data, increases storage capacity and improves the performance of your system.
It’s a straightforward process that involves downloading the MacOS installer from the App Store, formatting the SSD to a compatible file system, and then running the installer.
Installing Mac OS on an external SSD is a smart way to expand your storage while maintaining the speed and performance of your Mac.
It presents an easy and seamless way to carry around your data and use your Mac OS on any Mac system.
This method also offers a convenient recovery solution in case of system failure.
Just ensure your SSD has enough space for the OS installation and future updates.
9 Steps: Installing Mac OS to an External SSD
|1||Acquire an external SSD|
|2||Format the SSD for Mac|
|4||Create a Bootable Installer for macOS|
|5||Install macOS on the external SSD|
|6||Boot from the external SSD|
|7||Continue the setup process|
|8||Update the macOS|
|9||Install necessary applications|
Five Facts About: Installing Mac OS to an External SSD
Benefits Of Installing Macos On An External Ssd
Experience lightning-fast performance and improved efficiency by installing macOS on an external SSD.
With faster boot times, increased storage capacity, and seamless data transfer, enjoy the flexibility and convenience of running your Mac OS from an external drive.
Improved Performance And Speed:
Installing macOS on an external SSD can significantly improve the performance and speed of your Mac.
Here are the reasons why:
Faster data transfer:
An external SSD offers faster read and write speeds compared to an internal hard drive.
This results in quicker file access and reduces loading times for applications, boosting overall performance.
Reduced boot time:
With macOS installed on an external SSD, your Mac will boot up much faster.
This means you can start working or gaming without waiting for your computer to launch.
The improved performance of an external SSD allows you to run multiple applications simultaneously without experiencing slowdowns. You can switch between tasks seamlessly and efficiently.
Applications will launch almost instantly, and you’ll experience minimal lag when working with resource-intensive software like video editing or graphic design tools.
Increased Storage Capacity:
Using an external SSD for macOS installation unlocks the possibility of expanding your storage capacity:
Additional space for files:
External SSDs come in various sizes, allowing you to choose one that suits your needs.
By installing macOS on an external SSD, you free up valuable space on your Mac’s internal drive for other data.
Large file handling:
If you frequently work with large files, such as videos or virtual machines, storing them on an external SSD offers more room and ensures efficient file management.
Should you need more storage in the future, upgrading an external SSD is often simpler and more cost-effective than replacing an internal hard drive.
You can easily swap or expand your external SSD without disrupting your macOS installation.
Enhanced Portability And Flexibility:
Installing macOS on an external SSD comes with the added benefit of increased portability and flexibility:
By having your macOS installation on an external SSD, you can carry your operating system and important files wherever you go.
Simply connect the external SSD to any Mac, and you have access to your customized environment.
With an external SSD, you can easily switch between Mac computers without any hassle.
Just connect your SSD and have your familiar macOS environment at your fingertips.
Having macOS installed on an external SSD provides an extra layer of security in case of hardware failure or data loss.
You can quickly recover your system by connecting the external SSD to another Mac.
By installing macOS on an external SSD, you can enjoy improved performance, increased storage capacity, and enhanced portability and flexibility.
Experience faster speeds, smoother multitasking, and the convenience of carrying your operating system with you wherever you go.
Upgrade your Mac and unlock its true potential with this simple and effective solution.
Choosing The Right External Ssd For Macos Installation
Find the perfect external SSD for macOS installation and transform your Mac OS into a portable system.
With a range of options to choose from, you’ll be able to install your Mac OS onto an external SSD hassle-free.
Are you ready to enhance your Mac experience by installing macOS on an external SSD?
If so, you’ve come to the right place! In this section, we’ll delve into the crucial aspect of selecting the ideal external SSD for your macOS installation.
It’s important to consider various factors that will ensure a smooth and efficient process. Without further ado, let’s dive in.
Factors To Consider When Selecting An External Ssd:
Ensure that the external SSD you choose is compatible with your Mac system. Check for compatibility with the macOS version you plan to install.
Determine the amount of storage space you require based on your needs.
Consider the size of your existing system and any additional data or applications you may want to include.
Look for an SSD that offers high read and write speeds. This will contribute to faster boot times and overall system performance.
Consider the interface type of the external SSD, such as USB, Thunderbolt, or NVMe. Ensure your Mac has the corresponding ports to connect the SSD.
Look for an SSD that is durable and reliable for long-term use, as you’ll be relying on it for your Mac system.
Set a budget for your external SSD, considering your storage and performance requirements. Find a balance between affordability and quality.
Recommended Ssd Models For Macos Installation:
Offering sleek design and exceptional read and write speeds, the Samsung T5 is a popular choice among Mac users.
SanDisk Extreme Pro Portable SSD:
With its rugged build quality and fast transfer speeds, the SanDisk Extreme Pro is a reliable option for macOS installation.
This portable SSD offers impressive performance, durability, and affordability, making it a great choice for Mac users.
WD My Passport SSD:
Known for its compact design and reliable performance, the WD My Passport SSD is an excellent option for macOS installation.
If you’re looking for lightning-fast transfer speeds, the Samsung X5 Thunderbolt 3 SSD is a top contender.
Selecting the right external SSD is crucial to ensure a seamless and efficient macOS installation process.
Consider the factors mentioned above and explore the recommended SSD models to make an informed decision.
Get ready to experience the benefits of running macOS on an external SSD!
Step-By-Step Guide To Installing Macos On An External Ssd
Looking to install macOS on an external SSD? This step-by-step guide will walk you through the process, making it easy to enjoy the benefits of a portable Mac OS installation on your external drive.
Are you looking to install macOS on an external SSD? You’ve come to the right place!
We will walk you through the process step-by-step, making it easy for you to install macOS on your external SSD. So, let’s get started!
Preparing The External Ssd For Installation
Before we dive into the installation process, there are a few things you need to do to prepare your external SSD.
Here’s what you need to do:
- Connect the external SSD to your Mac and ensure it is properly recognized.
- If there are any important files on the external SSD, make sure to back them up to ensure you don’t lose any data during the installation.
- Format the external SSD to the appropriate file system format (usually APFS or Mac OS Extended) using the Disk Utility tool.
Creating A Bootable Macos Installer
Now that your external SSD is ready, it’s time to create a bootable macOS installer. This will allow you to install macOS on your external SSD.
Follow these steps:
- Download the macOS installer from the App Store.
- Connect a USB drive with sufficient storage capacity to your Mac.
- Use the Terminal app to create a bootable installer on the USB drive using a specific command.
- Once the bootable installer is created, you can disconnect the USB drive.
Installing Macos On The External Ssd
With the bootable installer ready, it’s time to install macOS on your external SSD.
- Restart your Mac and hold down the Option key to access the Startup Manager.
- Select the bootable installer from the list of available startup disks.
- Follow the on-screen instructions to begin the installation process.
- When prompted to select a destination drive, choose your external SSD.
- Complete the installation process and wait for your Mac to restart.
Setting Up The Newly Installed Macos On The External Ssd
Congratulations! You now have macOS installed on your external SSD. The final step is to set up the newly installed macOS and make sure everything is running smoothly.
Here’s what you need to do:
- Go through the initial setup process, including selecting your language, signing in with your Apple ID, and configuring preferences.
- Once you’re in the macOS environment, connect to the internet and install any necessary updates.
- Transfer your files, applications, and settings from your old Mac to the external SSD using the Migration Assistant.
- Customize your settings, install any additional software you need, and organize your files on the external SSD.
And there you have it! By following these step-by-step instructions, you can successfully install macOS on an external SSD.
Enjoy the flexibility and portability of having macOS on your external drive!
Troubleshooting Common Issues During Installation
Troubleshooting common issues during installation can be frustrating, especially when trying to install Mac OS to an external SSD.
Ensure a smooth process by following these helpful tips and avoiding common pitfalls.
Fixing Compatibility Issues Between External Ssd And Macos:
Ensure that your external SSD is properly formatted and compatible with macOS.
You can check the manufacturer’s website or user manual for compatibility information.
Make sure that your Mac’s operating system is up to date. Updating to the latest version can often resolve compatibility issues.
Verify that the external SSD is connected to a compatible port on your Mac.
Different Mac models may have different types of ports, such as USB-A, USB-C, or Thunderbolt. Use the appropriate cable or adapter if needed.
Try connecting the external SSD to a different port on your Mac. Sometimes, connection issues can be resolved simply by using a different port.
If you are using a USB hub or adapter, try connecting the external SSD directly to your Mac.
Some hubs or adapters may not provide enough power or have compatibility issues.
Resolving Installation Errors And Failures:
Check if there is enough free space on your external SSD for the macOS installation.
Insufficient storage can cause installation errors. Free up space by deleting unwanted files or formatting the SSD if necessary.
Restart your Mac and try the installation process again. Sometimes, a simple restart can fix installation errors.
If you are getting specific error messages during the installation, search for those error codes or messages online.
There may be specific troubleshooting steps or solutions available for your particular issue.
Disconnect any other external devices or peripherals connected to your Mac during the installation. Sometimes, conflicts with other devices can cause installation failures.
Troubleshooting Performance Or Storage-Related Problems:
If you are experiencing slow performance after installing macOS on your external SSD, ensure that your Mac’s settings are optimized for external storage.
Go to System Preferences > Startup Disk and select the external SSD as the default startup disk.
Check if there are any background processes or applications consuming excessive resources.
Quit or disable unnecessary applications to free up system resources and improve performance.
Monitor the storage usage of your external SSD. Unnecessary files, caches, or temporary data can take up valuable space and potentially impact performance. Use Disk Utility to scan and clean your external SSD if needed.
If you are still facing performance or storage-related problems, consider upgrading your external SSD to a larger capacity model.
This will provide more space for your files and can result in improved performance.
Remember, troubleshooting common issues during the installation of macOS on an external SSD requires thorough understanding of compatibility, installation errors, and performance optimization.
By following these steps, you can overcome hurdles and ensure a smooth installation process.
Tips For Optimizing Macos On An External Ssd
Optimize your macOS experience by installing Mac OS on an external SSD.
Increase speed and storage while following these simple tips. Boost your performance with easy setup and enjoy the benefits of an external SSD.
With the option to install macOS on an external SSD, you can enjoy faster performance and increased storage capacity for your Mac.
To make the most out of this setup, here are some useful tips for optimizing macOS on an external SSD:
Managing Storage And Freeing Up Disk Space:
- Regularly review files and applications stored on your Mac and delete any unnecessary or large files to free up disk space.
- Utilize macOS built-in storage management tools to identify and remove clutter, such as duplicates, temporary files, and unused applications.
- Offload rarely used files to an external hard drive or cloud storage solution to save valuable space on your SSD.
- Clean up your Downloads folder regularly, as it can accumulate unnecessary files over time.
Configuring Macos Settings For Optimal Performance:
- Enable TRIM, a feature that helps maintain SSD performance over time, by entering a command in Terminal or using third-party apps like Trim Enabler.
- Adjust your Energy Saver settings to optimize power consumption and SSD performance. For example, enable Power Nap to allow your Mac to perform background tasks without fully waking up.
- Optimize your Mac’s virtual memory settings to prevent excessive swapping between RAM and the external SSD, thus improving overall performance.
- Customize your Notifications preferences to minimize system interruptions and improve productivity.
Best Practices For Maintaining The External Ssd And Macos System:
- Keep your macOS and apps up to date to ensure compatibility and access to the latest features and security enhancements.
- Regularly back up your external SSD using Time Machine or an alternative backup solution. This will protect your data and facilitate easy restoration in case of any issues.
- Avoid abruptly disconnecting the external SSD from your Mac to prevent data corruption. Always use the “Eject” option to safely remove the drive.
- Periodically check for and install firmware updates for your external SSD, as these updates often include performance and reliability improvements.
By following these tips, you can optimize macOS on your external SSD for enhanced performance, improved storage management, and a smoother overall user experience.
Migrating Data And Applications To An External Ssd
Migrate your data and applications seamlessly by installing Mac OS on an external SSD, enhancing performance and portability.
Experience faster speeds and enjoy the flexibility of accessing your files and software on any Mac device.
If you’re looking to install macOS on an external SSD, one crucial step is migrating your data and applications to the new setup.
This ensures that all your important files, folders, and settings are seamlessly transitioned to the external drive.
In this section, we’ll explore the steps to transfer files and folders, move applications and settings, and update backups and synchronization with your new setup.
Transferring Files And Folders To The External Ssd:
To successfully transfer your files and folders to the external SSD, follow these steps:
- Connect the external SSD to your Mac and ensure it is properly recognized.
- Open the Finder window and navigate to the location of your files and folders.
- Select the files and folders you want to transfer and drag them to the external SSD in the Finder window.
- Wait for the transfer to complete, and verify that the files and folders now appear on the external SSD.
Moving Applications And Settings To The External Ssd:
Moving applications and settings to the external SSD requires a slightly different approach.
Here’s how to do it:
- Open the Applications folder on your Mac and identify the applications you want to move.
- Quit all the applications you plan to move and ensure they are fully closed.
- Drag the selected applications from the Applications folder to the external SSD.
- Once the transfer is complete, hold the Option key on your Mac while launching each application. This prompts macOS to ask for the new application location, where you can select the corresponding app on the external SSD.
- Make sure to also transfer any application settings or preferences to the external SSD. These are usually found in the Library folder within your user account.
Updating Backups And Synchronization With The New Setup:
Now that your data, applications, and settings are on the external SSD, it’s crucial to update your backups and synchronization processes.
Here’s what you should do:
- Check your existing backup solution and ensure it’s configured to include the external SSD in its backup scheme. This ensures all your data remains protected.
- Update any cloud synchronization services or software you use to sync files and folders with the new external SSD location. This ensures that any changes you make are reflected across devices.
- Double-check that all your important data and applications are accessible and functioning properly from the external SSD. This validates the success of your migration process.
By following these steps, you can successfully migrate your data and applications to an external SSD, allowing for faster and more flexible access to your macOS setup.
Remember to regularly backup your external SSD to avoid any data loss and always stay on top of sync and backup procedures.
FAQ About Install Mac Os to External Ssd
What type of SSD is compatible with Mac OS?
Mac OS is compatible with any type of SATA-based SSD. It is also compatible with NVMe-based PCIe and M.2 SSDs.
Can I install Mac OS on an external SSD?
Yes, you can install Mac OS on an external SSD if it is connected via a Thunderbolt 3 port.
What are the minimum system requirements to install Mac OS on an external SSD?
The minimum system requirements are an Intel processor, 8 GB of RAM, and a 64GB external SSD connected via Thunderbolt 3 port.
How do I install Mac OS on an external SSD?
First, you need to format the external SSD as a bootable drive. Then, you should use the Mac OS installer to copy the Mac OS files onto your external SSD. Finally, you should update the Mac OS system preferences to boot from the external SSD.
Are there any risks to installing Mac OS on an external SSD?
There are some risks associated with installing Mac OS on an external SSD such as data loss or corruption. For this reason, it is recommended to back up your data before attempting to install Mac OS on an external SSD.
Installing macOS on an external SSD brings numerous benefits that enhance the overall performance and flexibility of your Mac system.
With a faster and more portable storage solution, you can experience improved loading times, smoother multitasking, and accelerated data transfer rates.
Furthermore, migrating the operating system to an external SSD allows you to free up space on your internal drive, ensuring optimal performance and longevity.
The convenience of being able to use the same operating system across different Mac devices makes this process even more appealing.
Additionally, with the ability to easily boot from your external SSD, you can bring your personalized workspace and settings wherever you go.
So, whether you’re a professional needing a portable work setup or a casual user looking to enhance your Mac experience, installing macOS on an external SSD is definitely a worthwhile investment.
Unlock the full potential of your Mac system and enjoy the benefits of speed, flexibility, and convenience with this straightforward and effective solution.
Bonus About The Topic: Install Mac Os to External Ssd
Can I Install Macos on an External Ssd?
Yes, you can install macOS on an external SSD. In order to do this, you will need to format the SSD in a specific way and then use special software to create a bootable image of the macOS installer.
Once you have done this, you can simply connect the SSD to your Mac and boot from it whenever you want to install or upgrade macOS.
Can I Install Macos from External Hard Drive?
You can absolutely install macOS from an external hard drive! In fact, it’s pretty easy to do.
The first thing you’ll need is a blank external hard drive with at least 8GB of storage space.
You’ll also need a USB flash drive with at least 8GB of storage space. The flash drive will be used to create a bootable installer for macOS.
Once you have your blank external hard drive and USB flash drive, you’ll need to format the external hard drive using the Mac OS Extended (Journaled) file system.
To do this, open Disk Utility (located in /Applications/Utilities), select your external hard drive from the list on the left, click on the “Erase” tab, and then choose “Mac OS Extended (Journaled)” from the “Format” drop-down menu. Once the formatting is complete, close Disk Utility.
Next, open the Terminal application (located in /Applications/Utilities) and enter the following command
sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia –volume /Volumes/MyVolume –nointeraction && say done This command will create a bootable installer for macOS Catalina on your external hard drive. The process may take a while, so be patient.
Once it’s finished, you should see a message that says “Done.”
Now that you have a bootable installer for macOS Catalina on your external hard drive, you can use it to install macOS on any Mac computer that doesn’t already have macOS installed.
Just connect the external hard drive to the computer, restart it while holding down the Option key, and then select yourexternal hard drive as the startup disk.
How Do I Install Macos on a New Ssd?
You’ve just bought a brand new SSD and you’re excited to install macOS on it.
Here’s how to do it:
1. Start by formatting the SSD. You can do this using Disk Utility, which is included with macOS.
Launch Disk Utility, select your SSD in the left sidebar, and click the “Erase” button. Give the drive a name, choose the “Mac OS Extended (Journaled)” format, and click “Erase.”
2. Once the SSD is formatted, open up Terminal (located in /Applications/Utilities).
Enter the following command: Sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/create install media –volume /Volumes/My Volume –application path /Applications/Install\ macOS\ Mojave.app –no interaction
Replace “My Volume” with the name of your SSD volume. This command will create a bootable installer for macOS Mojave on your SSD.
3. Quit Terminal and insert your bootable Mojave installer USB drive or SD card into your Mac.
Open up Disk Utility again and erase your main hard drive using the same steps as before (this will be where you install macOS Mojave).
Be sure to choose “Mac OS Extended (Journaled)” as the format type once again.
If you don’t have a spare USB drive or SD card lying around, you can use Carbon Copy Cloner to clone your existing hard drive onto the new SSD instead (skip to step 4).
Just be aware that this will transfer all of your existing files and settings onto the new driveif you want a clean slate, follow steps 2-3 instead.
4 . With CCC open and your main hard drive selected as the source, choose your newly formatted SSD as the destination then click Clone When prompted , make sure to check off Erase Destination .
CCC will now clone everything from your current hard drive onto your new solid state one!
When it’s done , restart your computer holding down Option (Alt) key then select startup disk icon → Your new Solid State Drive should now appear in Startup Manager .
Highlight it then press Return or Enter key → After successful installation of Catalina 10 .
How Do I Install Mac Big Sur on External Drive?
Assuming you would like a step by step guide on how to install Big Sur on an external drive:
1. Make sure your Mac is compatible with macOS Big Sur. You can check this by going to Apple’s website and looking up the specs for your particular model.
2. Ensure that you have enough free space on your external drive- as of writing, Big Sur requires a minimum of 12GB of storage space.
3. Connect your external drive to your Mac using either a USB or Thunderbolt cable.
4. Launch the “macOS Utilities” window by restarting your computer and holding down the Option key while it boots up.
If everything goes according to plan, you should see a list of options appear on screen after a few moments- one of which will be “Disk Utility.” Select this option using your mouse or trackpad, then click “Continue.”
5. In Disk Utility, select your external drive from the sidebar on the left hand side of the window.
Once selected, click on the “Erase” button near the top of the window. This will erase all data currently stored on the drive in preparation for installing macOS Big Sur.
6a) If you’re running OS X El Capitan 10.11 or later, open Finder and go to Applications > Utilities > Boot Camp Assistant .
Click Continue , then follow the instructions provided by Boot Camp Assistant to create a bootable USB drive.
Afterward, return to Step 4 above and continue with installing macOS onto your external drive as usual.
6b)If you’re running an older version of OS X, use these instructions instead: Downloading macOS Sierra from App Store .
Once downloaded, open Terminal (which can be found in Applications > Utilities).
Type in sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia –volume /Volumes/MyVolume –applicationpath /Applications/Install\ macOS\ Sierra copy and hit Enter .
This process may take some time depending on how fast your Mac and external drive are..
Afterward, return to Step 4 above and continue with installing macOS onto your external volume as usual..
7) When asked where you want to install macOS during installation, select Your Disk Name (the name you gave when erasing it in Disk Utility) from the dropdown menu rather than InstallmacOS Catalina .
Install Mac Os on External Drive
Installing Mac OS on an external drive is a great way to keep your main hard drive free of clutter and improve your computer’s performance.
Here’s how to do it:
- Connect your external hard drive to your Mac.
- Launch the Disk Utility application, which is located in the Utilities folder within the Applications folder.
- Select the external hard drive from the list of devices on the left side of the Disk Utility window.
- Click on the “Erase” tab at the top of the window.
- Choose “Mac OS Extended (Journaled)” from the Format drop-down menu and click on the “Erase” button. 6. Quit out of Disk Utility when formatting is complete.
- Insert your Mac OS X installation disc into your computer’s optical drive and restart your computer while holding down the C key on your keyboard .
The computer will boot from CD and begin OS X installation process, select language you wish to install then go through standard installation process, choosing external hard drive as destination when asked where you would like to install system software .
After installation has completed , reboot machine holding down Option key this time ,selecting external hard disk with new Mac OS X system as startup volume .
Install Macos on External Drive from Windows
It is possible to install macOS on an external drive from Windows. This can be useful if you want to have a portable version of macOS that you can take with you and use on any computer. The process is fairly simple, but there are a few things to keep in mind.
First, you will need to format the external drive as HFS+ (Mac OS Extended).
This can be done using Disk Utility on a Mac, or third-party software on Windows.
Once the drive is formatted, you can use Disk Utility on a Mac to create a bootable USB drive from the macOS installer file (this file can be downloaded from the Apple website).
Once the USB drive is created, it can be used to boot up any Mac and install macOS onto the external drive.
Keep in mind that this will erase anything already on the external drive, so make sure to back up any important data first.
Also, note that the external drive will need to be connected whenever you want to use macOS; it cannot be used as a standalone operating system.
Overall, installing macOS on an external drive from Windows is relatively simple and straightforward.
It does require some specific steps and formatting, but once everything is set up it should work just like any other instance of macOS.
Install Mac Os Monterey on External Drive
Mac OS Monterey is finally here and it’s packed with tons of new features and improvements.
One of the best new features is the ability to install MacOS on an external drive.
This means you can have a portable version of MacOS that you can take with you wherever you go.
We’re going to show you how to install MacOS Monterey on an external drive. Before we get started, there are a few things you need to know.
First, you need to have a USB flash drive that’s at least 16 GB in size.
Second, your computer must be running the latest version of MacOS (Big Sur).
If you’re not sure what version of MacOS your computer is running, click on the Apple icon in the top left corner of your screen and choose “About This Mac.” The version number will be listed under “macOS.”
Now that we have that out of the way, let’s get started! First, insert your USB flash drive into your computer.
Then open up Finder and head over to Applications > Utilities > Disk Utility .
Once Disk Utility opens up, select your USB flash drive from the sidebar and then click on the “Erase” button near the top of the window.
In the pop-up window that appears, give your drive a name (we recommend something like “MacOS Installer Drive”) and then make sure “Format” is set to “Mac OS Extended (Journaled).
Click on the “Erase” button and wait for Disk Utility to finish erasing your drive.
Next, open up Safari and download macOS Monterey from Apple’s website .
Once it has finished downloading, double-click on the file (called something like “Install macOS Monterey Beta”) to mount it as a disk image (.dmg file).
Now that we have our disk image mounted, we need to copy it onto our USB flash drive so we can use it for installation later.
To do this, open up Finder again and head over to Applications > Utilities > Terminal .
In Terminal , type in cd /Volumes/ followed by hitting Spacebar once; don’t forget this step or else Terminal won’t recognize our command!
Install Macos on External Drive from Recovery
When you install macOS from the recovery disk, your Mac automatically creates a new, separate volume on the external drive for the recovery disk.
This is different from installing macOS on an internal drive, where your Mac would create a single volume that contains both the operating system and your personal files.
The process of installing macOS on an external drive is similar to installing it on an internal drive.
The first step is to format the external drive as a GUID partition map with Journaled HFS+ file system.
Next, you need to create a bootable installer for macOS on the external drive. Finally, you can install macOS onto the external drive by following the prompts in the Recovery Disk Utility.
Once installation is complete, you can reboot your Mac from the external drive by holding down the Option key during startup and selecting the External Drive as your boot device.