20055 Views 2 Replies Latest reply: Oct 25, 2009 12:52 AM by BSteely
There isn't exactly a keyboard shortcut for changing display resolutions, but there is a way to sort of fake it. You can dry run the procedure with your MacBook Pro not connected to the TV to see how it works and then once you confirm the procedure, you can do the same with the TV attached and without benefit of being able to see the screen. Basically, the procedure goes something like this:
1) Start the Mac
2) Wait several minutes so that you are sure it has finished booting
3) Hit Command-Q followed by Command-Tab several times to make sure only the Finder is running
4) Hit Shift-Command-A. This will open a new Finder window into the Applications folder
5) Type "sys". This should cause System Preferences to be highlighted in the Applications folder
6) Hit Command-O. This should cause System Preferences to open
7) Hit Command-L. This assures System Preferences is at the Show All view
8) Type "displays" and hit Return. This should cause Displays Preferences to open
9) Type Shift-Tab at least three times. This should reset the element in focus to the starting point
10) Hit Tab twice. This should move the focus to the current active resolution
11) Hit the up (or down) arrow key. This should cause the resolution to change
As I said, try doing a dry run of this procedure with the Mac not connected to the external display and while watching the screen on the MBP. Once you are satisfied you have the procedure debugged and working, try it in clam shell mode with the external display attached.
By the way, it's much easier to try and fix this type of problem if you have a second Mac at your disposal that you can do screen sharing with. That's certainly a preferred method to the above. You can also do screen sharing with a PC using a VNC client if you don't own another Mac. But if you don't have another computer at your disposal, the above should work.