• Trying to connect my 13" retina to an iMac - I'd like to use the iMac as a larger screen for the laptop (the iMac is on loan while I find a replacement screen).
    I've tried using a Mini display port cable and switching the display by using combinations of the Command/Function/F2 but nothing seems to work.
    What am I doing wrong?

  • Depending on how old the imac is it just won't work....from about 2012, maybe a tad earlier, they won't accept video in.

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