Why won't my usb key boot my macs?
July 13, 2010 8:40 AM Subscribe
We have a macbookpro with a touchy DVD drive. I'm trying to upgrade it to snow leopard, but I somehow can't get my usb drive to be bootable.
I made an image of the snow leopard dvd (confirmed good by MD5 & google) on my macbook, which is already running snow leopard. Using disk utility, I've restored this image onto a PNY-brand 8GB usb drive, after first partitioning the USB drive Mac OS Extended (Journaled), GUID.
Everything appears to work fine each time, and the resultant disk looks just fine as a snow leopard disk. But neither the MBP or the MB will ever boot off it, or even recognize it as a bootable drive. What might this be? Do I just have a weird usb drive (I don't have another to try, though I guess I can buy one)? Or am I missing something obvious?