Originally Posted by kokozedman

Hey guys... like flip, it's been a while since I posted here. Been using the X50IN with Mountain Lion with beauty so far.


--> Open the System Preferences, go to the Display, then press the Option key: a button will appear that says "Detect Displays". You don't need to reboot in order to detect your secondary display.

Just on a side note, you should not remove the secondary display after you have it detected. Doing so will disable proper hardware acceleration of the video card, and also will disable display power-saving.