My old iMac was coughing and sputtering.... Apple couldn't fix it, neither could I - however, the monitor still worked. So I set it up as a second monitor, (the new one on the left, old on the right).
Killer setup and I'm ready to film and edit the upcoming football season. - JamesJM
P.S. Oh yeah.. yes, that's my 2nd oldest grandson taking a leak on my ranch (left computer)... granddaughter from several years ago on the old computer (right).