So it is possible that I can get a good deal on a 2012 iMac. The only thing that scares me is the slow 1tb hard drive in it. I searched on how to replace it but it is extremely complicated because the iMac is glued together, I'm not ready to go down that road.
So my idea was to take a SATA3 SSD, put it in a SATA USB 3.0 HDD enclosure and then connect that over USB 3.0 and install MacOS on it.
Q: Is it a good idea to run your OS on an external hard drive? Does anyone have experience with this or alternative solutions?