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"Missing Operating system_ " After installing Yosemite

Please help, after installing Yosemite now i can't get to my windows 7 anymore . At first i can't even get to see Windows partition when i hold ALT during boot but i got that fixed but now that i try to get to windows its just not happening . Please help 😟


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MacBook Pro (Retina, Mid 2012), OS X Yosemite (10.10)

Posted on Oct 17, 2014 6:49 PM

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145 replies

Oct 17, 2014 7:22 PM in response to LokoMix

Yes, but it requires some work. If you want to please download...


1. Testdisk - http://www.cgsecurity.org/wiki/TestDisk this to look for the deleted NTFS header.

2. GPT Fdisk - http://sourceforge.net/projects/gptfdisk/ - this is to fix partitions after Testdisk has found the correct partition header.


If you have a 500GB disk, 419 for OS X and 40GB for Windows, where is the other ~31GB data. It looks like that is where the NTFS header is sitting.

"Missing Operating system_ " After installing Yosemite

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