MacBookPro HDMI Display Issues After 10.8.2

A knowledge base article about MacBookPro HDMI Display Issues After 10.8.2 provided by the UC Berkeley IT Service Hub - Knowledge Portal

 

This is a step-by-step explanation of how to troubleshoot display issues in MacBookPro HDMI display after 10.8.2.

  1. Go to Finder
  2. In the root directory (MacBookPro or whatever your HD is called), go to Library, go to Preferences, find com.apple.windowserver.plist and put it into Trash
  3. In your own user directory, go to Library (to see the user Library folder in Finder, click the Go menu in finder and at the same time hold the Option key down, and then you'll see Library). Go to Preferences folder within the Library folder, go to the ByHost directory within the Preferences folder, find com.apple.windowserver.[random numbers and letters].plist, and put that plist file into Trash
  4. There may be more than one com.apple.windowserver.xxxxxx.plist file in both of these directories, including one that ends in plist.lck--just remove any plist file with "windowserver" in it. You won't cause any harm by removing a plist file
  5. You do not have to empty the Trash folder, but you can if you want to
  6. Reboot computer


If this fix doesn't work (and it may not, especially with non-Retina MBPs) contact Apple support.