Original post by: Jose A Z Lopez ,
Same problem right now here: my Intel iMac refuse to boot (after a 10.6 automatic update error). I tried all: it doesn't boot from any CD, it is always blocked after safe reboot, single user mode repairs and so one. I was even able to boot it as a target HD and do Disk Repairs from my laptop (having it as a external HD Fireware disk). Did smebody find a solution? Thanks!