Hello there! I'm really new into iMacs or Apple devices. I got an iMac mid 2011 21.5" from the trash (literally) since about a year. It's working nice, it has a 256GB SSD disk, 6GB of RAM, AMD Radeon HD 6770M. But, I started to notice that most common apps are not working anymore under High...
I'll relate this as a cautionary tale for anyone who finds it helpful.
A friend of mine took to the local branch of GRAVIS in Düsseldorf her iMac 21.5" Mid 2011 to have macOS updated. The most recent backup she had was to an external Time Machine disk from about 2015 (yes, I know). She asked...