Currently Being ModeratedDec 19, 2012 1:41 PM (in response to lorenz.paulus)
When the account boots correctly, go to disk utilites and try to repair the permissions to the Hard Drive. It seems like you have a software rather than a hardware issue.
Currently Being ModeratedDec 19, 2012 1:43 PM (in response to lorenz.paulus)
Is yours a 21.5" or a 27" iMac?
Were your prompted to do the EFI by Software Update?
Currently Being ModeratedDec 19, 2012 2:35 PM (in response to babowa)
It's a 21.5" and yep, indeed, i was prompted to do so.
Currently Being ModeratedDec 19, 2012 3:46 PM (in response to lorenz.paulus)
Okay, just thought I'd check because the update did say it was only for the 21.5" - in any case, so that is not the cause of your problem. I don't have any other suggestion for you except that if you just now got it, I would absolutely either call Apple (make use of your warranty) or take it to a Genius Bar and ask them to take care of it. It could almost qualify as a "DOA" since you were prompted to install a firmware update immediately after setup.
Currently Being ModeratedDec 19, 2012 3:57 PM (in response to lorenz.paulus)
Take it back and get a refund. You have 14 days to return it No Questions Asked. Then buy another that actually works correctly.
Currently Being ModeratedDec 28, 2012 6:59 AM (in response to lorenz.paulus)
Okay, I tried again to do an SMC-reset, PRAM-reset, and repair disk-permissions. As a result, the iMac boots now fine, as it seems. The moment I face only the slightest of problems again, I'll call Apple.
Thanks guys for your help!
Currently Being ModeratedDec 30, 2012 12:46 AM (in response to lorenz.paulus)
Booting in verbose mode, I figured that an error message:
com.apple.launchd: (com.apple.coreservices.appleid.authentication) Exit timeout elapsed (20 seconds). Killing
is preventing proper start-up. Has anyone experienced this behaviour before?
Currently Being ModeratedDec 30, 2012 6:01 PM (in response to lorenz.paulus)
I am getting the same killing off of authentification service. See my post of Dec 30, 2012 11:16 AM on this thread https://discussions.apple.com/message/20732028#20732028
Currently Being ModeratedJan 9, 2013 12:23 AM (in response to spritrig)
After talking two times to Apple Care for about one hour each, I've come to no conclusion what the problem is about or how to fix it.
I tried to erase my HD und reinstall Mountain Lion again, which I did also two times. The strange thing was that I faced the same issue every time after transferring my TM-back-up to my iMac. So I came up with the idea that my back-up was broken somehow and included that error.
Anyway, I erased my HD once more, installed Mountain Lion as clean as possible, and installed all of my software manually. I haven't seen the issue since. It just took me like 20-30 hours to try out everything and two useless calls to Apple Care. It's like the Windows-times are back…
Maybe this helps anyone.