imac 7.1. It’s ten years old now.
I freep, and design pcb’s with it using McCad PCB-ST.
I had occasion to email them a few weeks ago and they couldn’t believe I was still running such an old version of their software.
I started out with them using a fat mac in ‘89.
It looks like your machine would actually run the latest OS but without hand-off support. Your Bluetooth hardware is too old. Looks like the latest version of MCAD is $795. I see why you are sticking with what you got.
One of Apple's problems is they build such good computers is they last so long you practically have to beat them to death with a Mack truck. . .