How to make an external bootable working drive in macOS Ventura

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https://appleinsider.com/inside/macos-ventura/tips/how-to-make-an-external-bootable-working-drive-in-macos-ventura

When something goes wrong with your Mac, it’s a boon to have a separate, external drive that you can work from — but Apple no longer makes that easy…

It’s also possible that if you make a mistake along the way, it’s conceivable that you could end up wiping your Mac’s internal drive. It’s possibly fortunate, then, that Apple throws many hurdles in the way to stop you making a macOS Ventura external bootable drive.

Or rather, it really wants to stop other people making such a startup drive and plugging it into your Mac. Apple has taken steps to secure your Mac from bad actors..

you have to go through two broad steps to make this work.

Allow your Mac to boot from external drives at all

Prepare a bootable external drive

That first part is crucial, and it is crucial that you do it before you have any problems. For if your Mac won’t startup, you cannot get in to enable booting from an external drive…

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