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Select a user to set as the owner of the new volume and optionally copy the user’s account settings.

Select your external hard drive and click Continue.

When you arrive on the drive selection screen, click Show All Disks.

Launch the “Install macOS Monterey” app.

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If your Mac isn’t on the list of supported devices, then you can still install Monterey on it, but the process is significantly more complicated than we can describe here.Īssuming your Mac is compatible with Monterey, here’s what you need to do to install macOS on your external hard drive: Here’s the official list of supported devices: Before you do that, we recommend you verify that your Mac can actually run Monterey. You’re now ready to install macOS Monterey on your external hard drive. Install macOS on Your External Hard Drive Its name is “Install macOS Monterey.” Step 3. Just like all apps downloaded from the App Store, the downloaded installer can be found in the Applications folder. Click the Get button and wait for the macOS Monterey installer to download.Select the search result named “ macOS Monterey.”.Click the search bar, type in “macOS Monterey,” and hit Return.

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This step is the easiest one because you can download the macOS Monterey installer directly from the App Store: Be patient and don’t interrupt it.ĭisk Utility will refuse to format any drive that’s in use, so make sure to close all running apps (or restart your Mac) if you’re experiencing issues during hard drive preparation. The process may take a while, depending on the size and speed of your drive.

Click Erase and wait for Disk Utility to prepare your external drive for you.

Give the external hard drive a suitable name and select “Mac OS Extended (Journaled)” as the drive’s format and “GUID Partition Map” as the drive’s partition scheme.

Select your external hard drive (not just a single partition).

Click View and choose the Show all devices option.Launch Disk Utility (located in Applications -> Utilities).Connect the external hard drive to your Mac.Unless you’re 100% sure that your external hard drive is freshly formatted based on the above-described requirements, we recommend you go through the following preparation steps: More specifically, it must be at least 64 GB large (the more storage space you have, the better) and formatted using the GUID partition scheme and the APFS file system (Mac OS Extended is no longer supported) To successfully install macOS on an external drive, the drive you want to use must be suitable for the task ahead. Just being curious and wanting to learn something new and potentially useful is the best reason you can have. Of course, you don’t actually need a good reason to install macOS Monterey on an external drive.

💽 Backup system: It’s essential to back up all important files so that you can recover them in the event of a data loss incident, but you may also want to consider setting up a backup operating system on your external drive so that you can minimize downtime as much as possible.

👨‍💻 Separating your work life from your personal life: By having two operating systems, you can elegantly separate your work life from your personal life to avoid embarrassing issues with mixed-up email attachments and other similarly unpleasant problems.

🧪 Testing: It’s always a good idea to test if a new version of macOS is compatible with all apps you rely on, and you can do just that by installing macOS on an external SSD or HDD.

Here are some situations where this approach can be especially useful: When you install macOS on an external hard drive, you can get your hands on the latest and greatest features without the risk of making your computer unusable. At the same time, new versions of macOS always introduce attractive new features, and it’s understandable if you want to try them as soon as possible. It’s not uncommon for users to see their Macs become less stable than a hormonal teenager going through a caffeine crash. Seasoned Apple users know that when a new major version of macOS is released, things do always go smoothly.

When It Makes Sense to Install macOS Monterey on an External Hard Drive

Is It Possible to Install macOS Monterey on an External SSD?.

When It Makes Sense to Install macOS Monterey on an External Hard Drive.