My dad's older iMac crapped out, won't start up properly but it's possible the HD is still OK... He just got a new 2013 imac and I'm wondering if we can dig out some files from the old one. I'm looking for the old firewire boot up trick where you could one mac HD in the finder of another, but between his old (which has firewire/usb2/ether) and the new (thunder/usb3/ether) so I can salvage some files. Any ideas or equivalents? thx.