Solved why does my mac have black bars on the side?

July 23, 2013 at 10:13:43
Specs: Macintosh OS X v,10.8.4
I tried the following suggestion, but it did not solve my problem:

@ ' Black Margin on MacBook Pro Display

1. Shut down the computer.
2. Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
3. Turn on the computer.
4. Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
5. Hold the keys down until the computer restarts and you hear the startup sound for the second time.
6. Release the keys.
If that fixes it, let me know, otherwise we'll try the second option to change display settings.

What else can I do?

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July 23, 2013 at 12:54:22
Have you checked the overscan function and tried toggling it?

1.) System Preferences. Apple Menu (upper-left corner)>>"System Preferences"
2.) Choose the Displays category.
3.a) There should be a tab near the top of the window labeled "Options".
3.b.) Click that tab.
4.) Click the check-box for Overscan.

:: mike

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July 23, 2013 at 14:32:54
✔ Best Answer
I see you're running Mountain Lion. Do as Mikelinus suggests, but in System Preferences / Displays see if the "best for built in displays " option is checked. Underneath that option will be the resolutions you can try.

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