install macos big sur on unsupported mac

I can't reinstall various apps I installed on Big Sur last year, it seems that most apps on the Apple Appstore don't work and about 90% of games on Apple Arcade don't work either.

I’m desperate to upgrade to Big Sur, especially as software support is being withdrawn from Catalina now, but I used to have it installed on two Macs I used last year anyway. YouTuber TQCB Loltigerflash- has made a video showing this error on However, several users on have complained that attempting to upgrade from Patched Sur to Monterey doesn’t work, saying that it stops 12 minutes before the installation was supposed to finish with an error message. Patched Sur developer Ben Sova/Ben 216k has published instructions on about how to install OCPL over Patched Sur, then how to install Monterey after that. It's very impressive to see the boot screen with a white Apple logo on a black background instead of a dark grey Apple logo on a light grey background. Apart from that, it can’t be upgraded to Monterey.

Unfortunately, Patched Sur support us coming to an end later this year. Patched Sur works by patching macOS, but it seems that OCLP works by patching the Mac itself to make it think it’s a later model. There’s also another one called Big Mac Patcher, which I hardly know anything about. I know I could install Patched Sur on my MacBook in less than an hour, but I’m not sure how to use Opencore Legacy Patcher (OCLP), although I’ve watched some videos and read a lot about it. I had no idea that rain might come through one skylight but not the other one and that I wouldn't even hear it. I had only recently managed to open my Velux skylights for the first time. I'm very careful, but I was in another room at the time which was somehow shielded from the rain. In the past on another MacBook Pro of the same model I used Patched Sur, but that MacBook Pro got liquid damaged when it rained through a skylight and it was before Monterey was released. I recently upgraded my MacBook Pro 9.2 (mid 2012, non Retina) from an HDD to an SSD and now I’ve bought 16Gb RAM for it, so I also want to upgrade the macOS from Catalina to Big Sur, and I’m hoping to upgrade it to Monterey after that.

Install macos big sur on unsupported mac