Install copy Mac OS on b/u external volume

is there a way to install a copy of mac os on an existing back up (external) volume to make it bootable without having to erase and format, thus losing the backup data?

Posted on Apr 3, 2023 11:30 AM

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Posted on Apr 3, 2023 12:39 PM

is there a way to install a copy of mac os on an existing back up (external) volume to make it bootable without having to erase and format, thus losing the backup data?

No.

Create a bootable USB installer you can use to boot, install, then migrate from your backup.

Keep the USB updated with the OS on your Mac (you have to remake it).

If you have a T2 Mac, make sure you can boot from an external before you need it:

About Startup Security Utility on a Mac with the Apple T2 Security Chip - Apple Support



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Apr 3, 2023 12:39 PM in response to nurleymon

is there a way to install a copy of mac os on an existing back up (external) volume to make it bootable without having to erase and format, thus losing the backup data?

No.

Create a bootable USB installer you can use to boot, install, then migrate from your backup.

Keep the USB updated with the OS on your Mac (you have to remake it).

If you have a T2 Mac, make sure you can boot from an external before you need it:

About Startup Security Utility on a Mac with the Apple T2 Security Chip - Apple Support



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Install copy Mac OS on b/u external volume

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