Blinking question mark folder?
So I recently installed rEFInd on my 2007 imac, running OSX 10.6.8 and got Kali Linux up and running just fine. I booted it again and got through the installation with no problems until I got to the partition part. The only option was something called ATA so I used that. It got about 1/20 through erasing it after a few hours and I gave up, canceled it, and shut the computer down. When I turned it on this morning I got a grey screen for a few seconds followed by a flashing folder with a question mark in it. I tried turning it on again with the option key held down, and this time got the grey screen with a cursor. It's still like that. I'm afraid to turn it off and mess it up more. What should I do? I have no OSX install disk as well but I have a thumb drive that supposedly has a bootable version of Kali on it.
iMac, Mac OS X (10.6.8)