Downgrading from Big Sur to Catalina

Started 3 months ago | Discussions thread
Phillip Forsten Senior Member • Posts: 1,253
Re: Stuck With Big Sur

wklee wrote:

it seems I could be stuck with Big Sur. My attempts with Internet Recovery has failed.

Reformatted the Hard Disk to HFS+ but now I am back to APFS and Big Sur.

I get a error message that the install '(MacOS Catalina) failed.

https://www.macworld.co.uk/how-to/recovery-mode-internet-3636668/

Perhaps you have a faulty drive in the Mac mini. I would try multiple times at least before giving up. I've used Internet Recovery numerous times and it was flawless. The Macs were returned back to the OS version they came with when they were new.

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