Turn off MacBook LCD when lid is open while connecting to external display in OS X Lion
I guess you know what I’m talking about. Let’s go to the solution directly first: Go to Terminal and input the command as follows, press Enter, input password as needed. sudo nvram boot-args=”iog=0x0″ Restart and try it out! When you want to get back to Lion’s default state, use this command: sudo nvram -d boot-args […]