I have a relatively new ( 3 weeks ) UMBP and I have not updated it. I have to wonder, after reading of some of the issues with 10.5.7, is there a better way to do the upgrade. Example: Do a fresh install of OSX, then do the upgrade, then reinstall all the software programs. I know for many this may be a nightmare, but in my case not too bad. Maybe doing a fresh install of 10.5.7, I think you can download it integrated. ( if that is the right word ) I'd like to be " up to date " , but at this point I am not experiencing any problems and see no need to update. This thought came to mind from past experiences with another OS ( Windows ) I used to use, where updates always screwed up something like drivers and such? Hell just doing a Windows Update for the OS will destroy the one and only Windows box I have here.