Well, depends on the people. This used to work with iMacs, although with display port instead of hdmi. https://www.lifewire.com/use-imac-as-monitor-with-target

Well, depends on the people. This used to work with iMacs, although with display port instead of hdmi. https://www.lifewire.com/use-imac-as-monitor-with-target-display-mode-2260906 https://www.lifewire.com/use-imac-as-monitor-with-target-dis...