I have an iMac that stopped booting, even in Safe Mode. It has Mountain Lion as its OS. I cleared the PRAM/NVRAM. It makes the Apple sound, but then there's just a white screen.
I ran Apple Hardware Test in extended mode, and it comes back saying that no problem is found. However, when I go into Disk Utility I see the 1TB partition as "Unformatted". See attached file.
The iMac does boot into Target Disk Mode and does show the lightning bolt in the circle that moves around the screen. I have connected a Thunderbolt cable from my MacBook Air (mid-2013) running Mavericks to the iMac (mid-2012).
My idea is to make the hard drive show up on my MacBook Air as an external drive through Target Disk Mode (TDM). Then I should be able to gain access and use EaseUS Data Recovery Wizard for Macs. However, I have not been able to make that connection despite having the cable connected.
I'm trying to avoid taking the hard drive out of the iMac, and I'm pretty sure that EaseUS Data Recovery Wizard has a fighting chance to recover the partition and make it bootable again, if it can see it as an external hard drive.
Can anybody help me with making the hard drive in the iMac assessable as a drive on my MacBook Air , or offer another solution to fix this problem? Thanks in advance, all you experts out there!