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Q: Boot Camp won't start after OSX Yosemite upgrade

Like so many others, I installed OSX Yosemite this morning and now Boot Camp no longer works.

 

After I updated to Yosemite I restarted my computer, held down  alt, and was presented nothing but a Macintosh HD. I followed “Loner T’s” instructions…

 

ndiskutil list

diskutil cs list

sudo gpt -vv -r show /dev/disk0

sudo fdisk /dev/disk0

 

Enter you password when prompted.

 

…and now a windows option is available during startup. However, when selected, all I get is a black screen with "A disk read error occurred" notice.

 

I’m in serious trouble if I cannot repair this issue. PLEASE HELP.

iMac, OS X Yosemite (10.10), Windows 7

Posted on Oct 18, 2014 12:00 PM

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Q: Boot Camp won't start after OSX Yosemite upgrade

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