Reports of startup issues after 2009-001 Security Update

Over the weekend, the mailbag caught a few notes of problems starting up once Leopard users had applied the 2009-001 Security Update (thanks @danielbru), and on Friday the spotty issue was noted by MacFixIt as well. Affected users report a variety of symptoms: the dreaded 'boot disk not found,' a 20-minute hold before the login screen shows up, and a disabled keyboard & mouse -- making the usual first troubleshooting step (a Safe Boot, triggered by holding down the shift key at start up) rather more difficult. As with most Mac OS X patches, the majority of those who applied the security update did so with no reported problems, but that's cold comfort if you're one of the unlucky few.

While it's always a good idea to verify your backups before updating to major dot releases, I doubt most users would bother with that due diligence when facing a 'simple' security update; unfortunately, since these updates often touch multiple subsystems, issues do emerge for some folks in the aftermath. MacFixit's thorough guide to troubleshooting startup problems is a good starting point if you're having problems, and if you've already been through the mill this weekend, let us know how you resolved your problems in the comments below.
This article was originally published on Tuaw.