Existing users, 
After application of this update (and 3 other Apple updates), my Leopard machine wouldn't start up any more. No good, and the kind of thing that would leave the average user without a machine, making a trip to a possibly far-away Apple store.
My MBP didn't start up in Safe mode either, verbose (Command-V after the startup chime), showed that it stalled after "CSRHIDTransitionDriver ... done".
Startup in single user mode (Command-S), then fsck'ing the harddrive, continuing to boot, logging in and fixing permissions using Disk Utility. Then, reboot. Machine is alive again.
Apple Security Update
For Tiger Mac OS X 10.4.
Version: 2009-005
broke my system
Feedback Type: Troubleshooting Report
Contributed by: davids-world.com Friday, October 17 2008 @ 12:11 PM PDT
Product Platform: MacOSX
Used Product For: Less than a month
System Info:
Comments
broke my system - Gennx30
its possible, but very unlikely that a 10.4 update will update any 10.5 installWednesday, August 05 2009 @ 08:01 PM PDT
broke my system - LaMair
I had a similar problem. Installed this morning, and upon restart I had no icons on desktop. Restarted manually, and it hung on grey screen and progress wheel. Tried to start in safe mode twice, but no luck--just grey screen. I reset PRAM and NVRAM, but it still hung on the grey screen.I read this and tried starting in single user mode.
Last line of text is:
CSRHIDTransitionDriver::probel booting in single use . . do not match
What next?
Thursday, August 06 2009 @ 10:16 AM PDT
broke my system - LaMair
Since my last comment I restarted using the install disc, ran Disc Utility to repair and verify permissions on the hard drive. Everything was OK, but I still can't start. According to the Mac Support article on resolving startup issues, you don't need to use fsck (file system check) if you can repair the disc using Disc Utility.Thursday, August 06 2009 @ 11:41 AM PDT
broke my system - nessm
Same thing has just happened to mine, I updated about four things in one go and now it wont restart. use it for work and am totally stuck. Can you tell me what fcsk'ing your mac is?Help!
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Monday, February 23 2009 @ 11:04 AM PST