Mini DisplayPort to VGA isn't working. It won't recognize any external monitor. It worked just fine with my older spring 2011 MacBook Pro running Snow Leopard, but now with my brand new 2012 MacBook Pro running Mountain Lion, it no longer works

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Mini DisplayPort to VGA isn't working. It won't recognize any external monitor. It worked just fine with my older spring 2011 MacBook Pro running Snow Leopard, but now with my brand new 2012 MacBook Pro running Mountain Lion, it no longer works

I just bought a new MacBook Pro this summer and was all excited. But I'm very frustrated right now because I can't connect to any external monitors through VGA. My thunderbolt (DisplayPort Mini) to HDMI works just fine, but when I try with my other connector to go from Thunderbolt (DisplayPort Mini) to VGA, Nothing works. my screen goes blue and changes size like it recognized something but nothing is ever detected on the external moniter or projector. I'm not sure what is wrong but it's very frustrating. I'm just very depressed that it worked just fine with my 2-year-old MacBook Pro but isn't working now. I'm running OS X 10.8.2. I just upgraded yesterday from 10.8.1 but that upgrade did nothing to fix my problem. Can anyone help? Thanks

MacBook Pro, OS X Mountain Lion (10.8.2)

Posted on Sep 20, 2012 3:02 PM

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Answer 1

Feb 12, 2013 6:53 PM in response to Scotter_10

I am haveing this exact same issue. I have plugging in 3 monitors and tried two different VGA to mini displayport and nothing is working. I recently bought a Acer monitor and it work for an hour and now it back to doing the same thing.

When I plug the VGA adapter in to the monitor the monitor think its not connected to a computer then when disconnecting the VGA adapter the monitor thinks it is connected to a computer.

NEED SOME HELP!!! at the point of all my hair is pulled out.

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Answer 2

Oct 27, 2013 10:12 AM in response to Hesselden

I am haveing this exact same issue. I have plugging in 3 monitors and tried two different VGA to mini displayport and nothing is working. I recently bought a Acer monitor and it work for an hour and now it back to doing the same thing.

When I plug the VGA adapter in to the monitor the monitor think its not connected to a computer then when disconnecting the VGA adapter the monitor thinks it is connected to a computer.

NEED SOME HELP!!! at the point of all my hair is pulled out.

^^^

that is the same problem i am having! if anyone can help that would be great i'm losing my mind over here

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