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That's not true at all. You can use recovery mode to trivially revert back to the OS that was installed when the computer was purchased. If that's pre-Mojave th
by dkonofalski 6y ago
That's not true at all. You can use recovery mode to trivially revert back to the OS that was installed when the computer was purchased. If that's pre-Mojave then you can just upgrade back to Mojave afterwards.
- lebca 6y agoWhat if the Mac had a newer OS than Mojave originally installed on it? That is how I interpreted the parent poster's comment. Given this interpretation, I'm don't think I'd have the expectation to be able to install an earlier OS.
- dkonofalski 6y agoWith that interpretation, you'd be correct but I don't think you've ever been able to downgrade to something earlier than what it came with since the older OS wouldn't include the appropriate drivers or kexts to properly run the hardware.