iATKOS | United Kingdom

Upgraded my 2012 Mac mini to Sequoia using open core. My whole system was very slow after the upgrade. I then tried the after install patcher, but that didn’t help. Try to log into my computer after a few days and it was basically frozen. Turned it off and turned it back on and this is what I get. I can’t get past it. It loads a bunch of code and stops on the screen every time. I can’t get past it. Tried using a USB boot and it won’t recognize it. And I screwed or is there anything that could be done?