I'm new to apple, and finally got my second hand iMac booted.
I try to connect an external display to the iMac with an mini display port adapter.
I have 2 adapters, 1 does nothing, the other makes my external display working (FHD and 4K), but then, the iMac reboots.
I think this has something to do with the switching of the graphics adapter.
I searched for a workaround to disable the AMD graphics adapter, but can't find this.
Does anyone has another solution, or tips for a work around?
Best Answer
It is safest to treat DisplayPort as not hot-pluggable.
Only connect or disconnect when the computer is off. Power on the display before the computer [it may go straight back to sleep, this is not a problem, it will re-awaken during boot.]
It theoretically should be capable, but relies on the computer, display & cable to all be compliant [& not buggy].
Google "display port hot plug" to see some of the issues it has.