VGA Projector problem since 10.8.2 update

My macbook retina does not work with my Viewsonic vga projector since the 10.8.2 update. It recognizes the projector but both screens go black and I can only see a huge cursor. Is this happening to anyone else? Is there a fix?

MacBook Pro with Retina display, OS X Mountain Lion (10.8.2)

Posted on Sep 20, 2012 11:36 AM

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30 replies

Sep 21, 2012 3:20 PM in response to kimmarie

I tried with two different projectors and it acts like it is connectng to the projector, but then fails. It doesn't show up as a secondary display under the Display system preferences. I tried rebooting with the projector plugged in, and it showed up momentarily but then dropped. This is clearly a bug... particularly interesting since it is listing as a bug they were FIXING in 10.8.2! I have never had a problem with this before in 10.8.1 or before.

Sep 21, 2012 5:07 PM in response to kimmarie

I did install the firmware update when I did the software updates, if that matters. On the bright side, I pulled out my iPad and used it today for all my presentations and it went great. Maybe the silver lining is that I'm not procrastinating about putting all my files on it and using it with my projector instead of carrying my computer to work everyday. 🙂

Sep 27, 2012 5:42 AM in response to kimmarie

Update: I have a fix! (At least it worked for me)


The two files that were isolated are:

/Library/Preferences/com.apple.windowserver.plist
/Users/yourname/Library/Preferences/ByHost/ "com.apple.windowserver.XXXXX.plist"


After pulling out these files to the trash can, please reset the PRAM per http://support.apple.com/kb/HT1379


In order to find the second file, go to the Go Menu on the top of the mac, hold Option on the keyboard, and then click on the Library.

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VGA Projector problem since 10.8.2 update

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