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diagnosing reason macbook pro won't boot

295 Views 2 Replies Latest reply: Jan 10, 2013 11:39 AM by Linc Davis RSS
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Jan 10, 2013 1:43 AM

My Macbook pro (15" from mid 2009 but upgraded to mountain lion a couple months ago) started getting really slow and unresponsive as I was using it. I shut it down manually and then started it back up but it hung on the gray screen with the apple logo and spinning circle.


Rebooting in verbose mode gave me disk0s2: I/O error


Booting using command+r and using disk utility to repair the disk didn't find anything wrong.


Additionally, I have a windows partition and can successfully boot and use that on the laptop.


It doesn't look like a hard drive failure to me because i can still use some of the partitions on the drive, but I'm not sure what else could be going on?


Does anyone have any other things I can try and debug or suggestions as to what is going on?



MacBook Pro (15-inch 2.53 GHz), OS X Mountain Lion (10.8)


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