xCode 6.1
$> defaults read /Applications/Xcode.app/Contents/Info DVTPlugInCompatibilityUUID
C4A681B0-4A26-480E-93EC-1218098B9AA0
xCode 6.1
$> defaults read /Applications/Xcode.app/Contents/Info DVTPlugInCompatibilityUUID
C4A681B0-4A26-480E-93EC-1218098B9AA0