Earlier this year I finally went to 10.9, but have a copy of Parallels that still runs 10.6.8 for old PPC software and a few other things. Parallels also runs the copy of Win XP that I used to keep as a VirtualPC system for running some very old hardware and software.
Microsoft killed VirtualPC for the Mac, with Intel processors, so the disk images have sat around in the archive for a while, but now they run again (mostly) even with serial port support. It does feel quite odd to see XP fully booted and running in only a few seconds ;-) Now these systems can run virtually for years to come, without needing to get an old machine out of the cupboard and hoping it still boots. (I do have Sheepshaver as well to run MacOS 9.1 - but that's only for a couple of games ;-)
With such emulators, it's actually possible to resurrect some quite ancient hardware/software for colour management - maybe not at the level of calibration/precision that you'd want in a prepress environment, but good enough for most people's needs.
Bye for now
Keith Cooper