HT201262: Try safe mode if your Mac doesn't finish starting up

Learn about Try safe mode if your Mac doesn't finish starting up

tho.hoang

Level 1 (0 points)

Q: how to disable discrete card on boot?

how to disable discrete card on boot?

My discrete card now total dead, i can only boot into safe mode, normal boot, some time very rare it pass discrete card check, then it boot in, then i used gfxGraphicsCard to force to use only integrated card, then it run fine.

if some time i forgot to force. then run ios simulator then it auto switch to discrete card, then it's black screen and i must reboot.

MacBook Pro, OS X Mountain Lion (10.8.4)

Posted on Jun 15, 2013 8:15 AM

I have this question too

Q: how to disable discrete card on boot?

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by Barney-15E,

Barney-15E Jun 15, 2013 8:21 AM in response to tho.hoang
Level 8 (49,784 points)

Mac OS X

Jun 15, 2013 8:21 AM in response to tho.hoang

Do you have a mid 2010 15" Macbook Pro? If so, see here:
http://support.apple.com/kb/ts4088

If this is the problem you have, Apple will replace the logic board up to three years from date of purchase.
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by tho.hoang,

tho.hoang Jun 15, 2013 8:49 AM in response to Barney-15E
Level 1 (0 points)

Jun 15, 2013 8:49 AM in response to Barney-15E

no, my mac is early 2011 - MC721
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HT201262: Try safe mode if your Mac doesn't finish starting up

Q: how to disable discrete card on boot?

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by Barney-15E,

by tho.hoang,

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