The other Mac can't use the iMac computer's built-in camera or ports. For example, if you start playing music on your iMac and then enter target display mode, the music won't be paused on your iMac. Or disconnect the cable, or restart either Mac.Īpps that were open on your iMac when entering target display mode remain open in target display mode.
Connect the two computers using the appropriate Mini DisplayPort or Thunderbolt cable.Make sure the other Mac has started up and is logged in to a macOS user account.Make sure your iMac has started up and meets the system requirements above.