Downgrading from Big Sur to Catalina

Started 3 months ago | Discussions thread
OP wklee Veteran Member • Posts: 9,786
Possible answer to OS failure.

Some users have found out the upgrade from Mojave (or other unsupported OS) to Big Sur, bypassing Catalina will fail. I don't know what the original OS was, before I received the Mac mini.

I had no luck with Internet Recovery for this Mac to restore to the factory default OS.

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Never buy version 1.0 of anything.
Don't it always seem to go
That you don't know what you've got
Till it's gone
They paved paradise
And put up a parking lot
Joni Mitchell's Big Yellow Taxi

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