startup screen wrong resolution

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Level 2

372 points

startup screen wrong resolution

When I restart my 2011 MacBook Pro, the startup screen (blue screen with apple logo - not the linen material screen which appears next) shows at the wrong resolution - 800 X 600, not 1440 X 900. When I get to the linen logo screen, the resolution is fine and there are no other problems. I have recently started using my MacBook Pro with a projector that changes the resolution to 800 X 600. So it seems like the startup screen is stuck like that.

I have run Diskwarrior, repaired permissions and restarted and it still appears this way.

Any suggestions?

Thanks.

Thom

MacBook Pro, Mac OS X (10.7.1), iPhone 4, iPad, iPod Touch

Posted on Sep 17, 2011 3:19 PM

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Answer 1

Best reply

KentuchyFried

Level 1

0 points

Sep 23, 2011 11:26 AM in response to Thom F.

Hey Thom,

I had the same problem and I've found the solution.

Just reset PRAM and NVRAM om your MacBook Pro, and you're good to go.

How do you do this?

Well, that's simple. just hold: Command + Alt + P + R before the Apple logo appears. Make sure you shut down your computer and hold the keys untill you hear the startup sound for the second time.

Good luck!

Cheers,

Kees de Groot,

the Netherlands

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Answer 2

RPaiva

Level 1

0 points

Apr 15, 2012 6:21 PM in response to KentuchyFried

The same just happened to me and your solution was great. Solved in 1 min 😀

Thank you very much KentuchyFried 😉

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Answer 3

Lagomen

Level 1

8 points

May 16, 2012 10:10 AM in response to KentuchyFried

Just what I needed - thanks for the fix.

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Answer 4

Speedy10

Level 1

0 points

Aug 30, 2013 2:10 PM in response to KentuchyFried

It worked perfectly, my screen started up in 4:3 apsect ratio cause of Parallels Access iPad control.

Even after deleting parallesls access, the computer still booted op wrong, but Command + Alt + P + R totaly work! Thanks a lot!

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Answer 5

Sep 8, 2013 5:56 PM in response to KentuchyFried

Totally worked for me too, thanks KentuchyFried.

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Answer 6

Nov 28, 2013 4:40 PM in response to Thom F.

THX KentuchyFried. Worked perfect!

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Answer 7

Jun 24, 2014 10:15 PM in response to luiscardenas97

The PRAM reset didn't work for me. Oddly, after fiddling around with the AirPlay settings using my son's account, which is not an admin account, with no luck, I logged in to my admin account and fiddled around with the AirPlay settings and something I did there fixed the issue.

Aloha!

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