graphics card reset for macbook pro
I keep getting pixelization from time to time on my screen when it boots up. How can I reset the graphics card to try to get rid of it?
MacBook Pro, OS X Mountain Lion (10.8.5), 8 GB of RAM
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Nubz N.
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Community Moderator
Hi urbanexus,
It sounds like if it boots to a pixelated screen you need to reboot to make it normal again. As screen settings are held it PRAM, try resetting that.
Apple computers: Troubleshooting issues with video on internal or external displays
Reset the system
You can reset the Mac's parameter RAM and SMC.
Reset the resolution
Start by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:
- Start up in Safe Mode.
- From the Apple () menu, choose System Preferences.
- Choose Displays
from the View menu to open the preferences pane.- Select any resolution and refresh rate that your display supports.
- Restart your computer.
OS X Mavericks: Reset your computer’s PRAM
- Shut down your Mac.
- Locate the following keys on the keyboard: Option, Command (⌘), P, and R. You will need to hold these keys down simultaneously in step 4.
- Turn on your Mac.
- Immediately press and hold the Option-Command-P-R keys. You must press this key combination before the gray screen appears.
Continue holding the keys down until your Mac restarts, and you hear the startup sound for the second time.- Release the keys.
Resetting PRAM may change some system settings and preferences. Use System Preferences to restore your settings.
Best regards,
Nubz