Apple Migration Assistant: backward? (Mojave to High Sierra)

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obvs
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Apple Migration Assistant: backward? (Mojave to High Sierra)

Post by obvs »

Despite not wanting to do things this way, I need to downgrade a system from Mojave to High Sierra. Ideally, if I could take all of the apps and everything, that would be awesome, so I don't have to manually reinstall them.

I have access to another Mac, also running High Sierra, and which can't be upgraded to Mojave, either.

Ideally, I would love to use Migration Assistant to copy the apps, user documents and settings from Mojave to High Sierra, but knowing Apple, I wouldn't expect this to be possible.

But is it? Do you know?
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Betonhaus
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Post by Betonhaus »

Couldn't you just copy the applications folder and relevant library folders over? There's only like 5 folders in the OS that you need to preserve last I checked.
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obvs
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Post by obvs »

The Applications folder contains apps from the current version of the OS.

Copying the Applications folder would replace the High Sierra apps with their Mojave versions.
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Betonhaus
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Post by Betonhaus »

So you'd have to delete about a dozen apps first. Depending on how much trouble you go through trying to get migration assistant working it may still be worth it at the end.
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obvs
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Post by obvs »

I can't leave a volume with Mojave's formatting in place and have High Sierra's stuff on it.

The system needs to exist as if never touched by Mojave.
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Betonhaus
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Post by Betonhaus »

Copy the App folder, the System and user library and preferences folders to a secondary drive or partition. reformat computer and install your OS of choice. Check each corresponding folder and delete anything that has a corresponding file or folder in the new install, then cross your fingers and merge.
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