Fix Your Stuff Community Store

MacBook Pro models with a 15" display

8247 Questions View all
Question Closed

Options

Why Display turns black in OSX works well with Bootcamp win 8.1?

I have a weird problem.it happens when i try to degrade my OS to SL from Mavericks (15" mid 2009 MacBook).When i try to install the os i having some difficulties so i just did a PRAM reset.After that the display just goes black after turn on the mac then it comes back with a windows booting screen.Ironically my mac turns to a windows machine. I tried almost everything .I just detach the HDD and try to install a new one for installing OSX.But no success. I contacted apple service provider and most unfortunately they cannot figure it out either.So Any help appreciated.

Sometimes no option screen or white screen boots on black screen and straight to windows boot screen.

Answer this question I have this problem too

Is this a good question?

Yes No
Score 0
Add a comment

1 Answer

Filter by:
Most Helpful Newest Oldest

Options

Hold down the power button to force the device to turn off. Once again, hold down Option+Cmd+P+R to reset the NVRAM and PRAM. Let the Mac cycle through two reset cycles (you should hear a total of three chimes). On the third one, release all of the keys, then press Option. What drives or drive partitions show up?

Was this answer helpful?

Yes No
Score 0

1 Comment:

Thank you.and sorry to say .nothing happened.just the same .i tried this and i can't get the white screen or option screen at all .boots on black screen and go straight to windows boot screen.

by

Add a comment
View Statistics:

Past 24 Hours: 0

Past 7 Days: 0

Past 30 Days: 0

All Time: 138