can i UPDATE macos from an external hard drive?
current os is 10.12.6. future os is 13.
MacBook Pro 15″, macOS 10.12
If you mean 10.13, yes.
If you mean 13, only if your MacBook Pro is a 2017 or newer model.
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You can start up macOS from one drive and install a new version of it on another. However, you can only install new versions that are compatible with your Mac.
can i UPDATE macos from an external hard drive?