Old iMac as a monitor - instructions for screen synchro »Sir Apfelot
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iMac 2011 27" (Thunderbolt) - Can you use it as a external screen? | MacRumors Forums
Trying to use my 2011 imac running high sierra as an external display for a OC via HDMI to miniDisplay port. Unfortunately I tried to book them up and using the windows (
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