My friend has some sort of Mac laptop running OS X 10.4, with a Lexmark X1150 all-in-one printer/scanner.

One day the printer just stopped working. Apparently this is due to an automatic update to the OS around December last year, perhaps from 10.4.10 to 10.4.11? It seems several USB devices were no longer supported after this (we have checked the printer still works on other systems).

Macs aren't my area but I said I'd take a look and this seemed a good place to start. So far I've heard of nasty solutions to reinstall 10.4, and prevent the problematic update getting installed - not a great fix IMO.

Anyone got any ideas?