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Yester5

macrumors 6502
Original poster
Worked fine running Yosemite on my 5K iMac.
After installing El Capitan, drive no longer loads a disk.
Help?
 
Worked fine running Yosemite on my 5K iMac.
After installing El Capitan, drive no longer loads a disk.
Help?
This is I think quite common after an Apple OS upgrade. First thing I would do is try and test in either a virtual machine or a dual boot scenario.
 
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