> On Sep 25, 2014, at 9:06 AM, Bruce Johnson <[email protected]> 
> wrote:
> 
> An odd one, I haven't run into before.
> 
> A 2008 27" iMac was updated to 10.9.5 yesterday, and when it came back up, no 
> user could log in.
> 
> It accepts the username and password, the little spinny gear starts right up, 
> and that's as far as it gets, never goes off the login screen.
> 
> Verbose boot shows no unusual notices.
> 
> Booted into recovery volume, Disk utility says the drive is OK, I even 
> repaired permissions, nothing unusual there. Didn't fix it.
> 
> Was able to get to the syslog via terminal in recovery, nothing unusual at 
> all, in fact, nothing after the login window appears.
> 
> Permissions look ok for the users directories.
> 
> I haven't run Diskwarrior yet, but I'm unsure that would help, because Disk 
> Utility thinks the volume has no errors. 
> 
> I'm worried that the Open Directory database may be borked. Does anyone know 
> if that can be managed from the recovery volume, or when connected to another 
> Mac in FW target mode?
> 
> 
> -- 
> Bruce Johnson

The first 27" iMac came out in late 2009. Based on the age of the machine, I 
suggest running Drive Genius 3 to scan for bad sectors as well as for 
read/write integrity. The update may have put a critical bit of code on a bad 
spot on the disk, which jibes with your "borked" suspicion.

Jim Scott
Eureka, CA

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