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blujein

macrumors member
Original poster
Jun 26, 2011
30
0
Australia
I'm trying to do a clean install of OS X Yosemite on a mid-2013 27-inch iMac, but when I boot to the OS X Yosemite USB drive and get to the point of selecting an installation drive nothing appears (other than the USB drive itself).

When I access Disk Utility it displays the Macintosh HD, but no partitions, and all of the options are grayed out.

I'm desperate for a solution here. Can anyone help?
 
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