I was trying to upgrade my 7 yr old iMac yesterday to Catalina. It froze and not able to go back to my previous version or anything. Went online and tried all the solutions offered but no luck. Apple Support recommended service center.
I have a MAC laptop I bought in 2015 that has newest Catalina OS on it. It powers up, but has a firmware lock that someone else put on it. Can you reset it?
Submit photos and a description of your PC to our build showcase
See other custom PC builds and get some ideas for what can be done
Services starting at $149.99