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Apple Computing Products:
Running Windows on your Mac
Can't switch back from Windows 7 to OS X
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<blockquote data-quote="chscag" data-source="post: 1543335" data-attributes="member: 46727"><p>No, those won't help. We need an OS X boot disk, preferably Snow Leopard so we can wipe the hard drive, install OS X and then re-load Lion from the Mac App store. What version of OS X came originally installed on your MacBook Pro?</p><p></p><p>I think I know what might have happened (I went back and re-read your first post). It appears the OS X boot sector (EFI) was somehow overwritten when you installed Windows 7.</p><p></p><p>A Lion OS X installation actually consists of 3 partitions: Boot Sector or EFI, OS X, and Recovery. Whether it was rEFIt that overwrote or changed the EFI or the Windows 7 format that did it, we don't know for sure.</p></blockquote><p></p>
[QUOTE="chscag, post: 1543335, member: 46727"] No, those won't help. We need an OS X boot disk, preferably Snow Leopard so we can wipe the hard drive, install OS X and then re-load Lion from the Mac App store. What version of OS X came originally installed on your MacBook Pro? I think I know what might have happened (I went back and re-read your first post). It appears the OS X boot sector (EFI) was somehow overwritten when you installed Windows 7. A Lion OS X installation actually consists of 3 partitions: Boot Sector or EFI, OS X, and Recovery. Whether it was rEFIt that overwrote or changed the EFI or the Windows 7 format that did it, we don't know for sure. [/QUOTE]
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Apple Computing Products:
Running Windows on your Mac
Can't switch back from Windows 7 to OS X
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