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Trouble starting up, anyone know how to fix?

I tried updating my apps last night, and the process didn't work. I rebooted my MacBook Air and I keep getting a white Mac screen with white text in a black box. It says unable to find driver for this platform. I'll try to post a picture as well., anyone know how to fix?

MacBook Air (13-inch Mid 2012)

Posted on Oct 13, 2013 9:51 AM

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Oct 13, 2013 11:11 AM in response to Nathan.26

If you don't already have a current backup, back up all data, then reinstall the OS. You don't need to erase the startup volume, and you won't need your backup unless something goes wrong. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.

There are ways to back up a computer that isn't fully functional. Ask if you need guidance.

If you installed the Java runtime distributed by Apple and still need it, you'll have to reinstall it.

Trouble starting up, anyone know how to fix?

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