I’m using my MacBook Pro (OS X 10.6) standing in a shelf with an external screen on my desk so I don’t use and need the internal screen. But if the internal one is on it’s shown in spaces.
It is possible to use the MacBook with the internal screen switched off by putting it to sleep and wake it with an external input device while the Book is close. But this way always needs a short sleep and interrupt working. So I wonder if it’s is possible to switch off only the internal screen by software (an app, via Terminal, AppleScript, a keyboard short cut etc.) without switch off the external screen?
I know that there’s a shortcut for “sleep screen“ but this affects all screens including the external one.