To change resolution edit com.apple.boot.plist

   1. In OSX go to Library/Preferences/SystemConfiguration/
   2. Copy the file "com.apple.Boot.plist" to desktop
   3. Open "com.apple.boot.plist" in Text Editor.
   4. Add this in:
      <key>Graphics Mode</key>
      <string>"1280x1024x32@60"</string>
      you can change the resolution to your liking. "x32" means 32 bit color, "@60" is the refresh rate.
   5. save the file, save it as a .plist not .txt!
   6. copy and replace the original.