Missing peripherals after getting machine back from the shop
I have a 2017 iMac with wo Thunderbolt 3 ports ... after getting the machine back from the shop for upgrades my Mac is not seeing what is connected to them.
One has an SSD connected to it ... and the other has a secondary monitor.
Is there a way to force the machine to look ?
It acts as though it was still at the shop ... i am a novice about this ... need help.