Macbookpro letterbox display at startup

[tiger2]

i have a 2012 macbook pro running latest osx. in order to give a presentation to parents at school i booted the computer while connected to an lcd projector with a different resolution (800 x 600, i think) than the macbook. now, whenever i boot the macbook it has black letterboxes on either side of the screen.

the first time i booted it after the presentation i had to switch the resolution back to 1680 x 1050. once the computer gets past the apple logo and that circular rotating dash thing, it reverts to 1680 x 1050 and the letterboxes go away, but for some reason it bugs me.

is there a way to stop it from doing this?

thank you for your time!

 

[justperry]

i have a 2012 macbook pro running latest osx. in order to give a presentation to parents at school i booted the computer while connected to an lcd projector with a different resolution (800 x 600, i think) than the macbook. now, whenever i boot the macbook it has black letterboxes on either side of the screen.

the first time i booted it after the presentation i had to switch the resolution back to 1680 x 1050. once the computer gets past the apple logo and that circular rotating dash thing, it reverts to 1680 x 1050 and the letterboxes go away, but for some reason it bugs me.

is there a way to stop it from doing this?

thank you for your time!

You might try clearing the PRAM, hold Command-Option-P-R on startup and release after you hear the startup sound 3 times.

 

[tiger2]

You might try clearing the PRAM, hold Command-Option-P-R on startup and release after you hear the startup sound 3 times.

It worked!

Thank you very much!

 

[justperry]

It worked!

Thank you very much!

No worries

If you have problems like these first thing you think about is resetting PRAM or SMU, or resetting permissions.
In this case I though it was obvious (for me) to reset the PRAM since you got it at startup but vanished after login.