So I’m downgrading the OS from Mojave to back to Lion..backed up hd with TimeMachine. I will erase the drive and install the older OS. My question is will I be able to restore my applications from my TM backup?
How to Restore Apps from TimeMachine After Downgrading macOS
macosmojave
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Best Answer
I am afraid it may depend on if you use an external hard drive for Time Machine backup or not. Since most methods to downgrade macOS are related to erase the internal hard drive which contains your original macOS. So it would be great if you have backed up files with an external hard drive because you can Restore your Mac from a backup.
Another suggestion is that, if your Mac was installed with Lion when you bought it, you can reinstall to Lion by rebooting and holding Shift-Option-⌘-R As this support post said Reinstall the macOS that came with your Mac,without easing the disk, unless you want to to. Like it said: You probably don't need to erase, unless you're selling, trading in, or giving away your Mac, or you have an issue that requires you to erase.