Hi I have just run the combo updater for 10.6.8 on our 2009 Mac Pro and 2010 MacBook Pro. The update went off without a hitch on the Pro, but on the MacBook, it went most of the way, but the machine froze during the 'writing package receipts' phase. I left it for some time, but in the end had to force power-down. When I powered on, it started to boot, then powered down while on the grey screen with the cog, rebooted by itself, and now seems OK. I'm typing this on it now. It was very slow logging after the login screen, but seems fine now. Are there any potential problems that this incomplete installation could cause? Are the 'package receipts' important? Should I reinstall from our Timemachine backup, or do you think it's OK just to carry on using the machine as is for now? Thanks in advance for you advice!