On Nov 21, 2005, at 3:38 PM, J wrote: > YES > And I can't have any interruptions. Unless we know what your critical software is, we can't be of much help. We're well past the stage where Apple puts things on software update that universally hose everyone - and if 10.4.3 did that, you'd have heard about it by now. So you need to ask something specific, and probably on a forum dedicated to your important software that can't be interrupted. If you really want to be sure, you need a test box with a comparable configuration. If the update hoses anything, it will most likely be something obscure that is associated with your specific configuration, not general users at large. I've done every update immediately since I started with OS X back at 10.2.something without ever having any problems - but my 4 Macs are very generic. SR