An iMac has a large, sharp display built into it. It seems obvious that you should be able to connect another device and use the iMac like… An iMac has a large, sharp display built into it. It seems obvious that you should be able to connect another device and use the iMac like a normal monitor. https://medium.com/@chris.ahrweiler/turn-any-imac-into-an-hdmi-monitor-da2211a69ec9