I have an old MacBook Air, which, when using Thunderbolt cable, I am able to mirror the screen on my iMac.

However, I cannot do the same for my newer MacBook 12".

Any ideas?


Ensure that under System Preferences > Displays > Arrangement (this tab only shows up if your computer detects an external display), the "Mirror Displays" checkbox at the bottom is checked.

This checkbox determines whether your secondary display will act as an "extension" or as a mirror of your primary.

  • What I mean is that there is no cabling that allows this and not a software related problem. – James Ronaldo Apr 13 '16 at 5:54
  • There might be external third party USB-C to VGA, or USB-C to Thunderbolt (which you can adapt to Thunderbolt to VGA) – perhapsmaybeharry Apr 13 '16 at 6:19
  • still does not make me see from the macbook 12 inch on the imac – James Ronaldo Apr 14 '16 at 6:02

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