Most books nowadays are "bilingual". Yet up to, say Photoshop 4, mac was the better platform for using Photoshop. This was mainly due to Microsoft comps being DOS-based, and used in offices, and mac having a graphic interface from the start, and thus being used for DTP.
This situation has gradually changed, and nowadays, two third of Photoshop packages are sold for Windows based comps.
When I reply here on the board, I tend to be Windows, not because it's better, but because it's the platform I use. Julie is more mac for the same, yet opposite, reason.
And more and more people are seeing that the difference between the two are like the differences between British and American. So more and more books, magazines and fori are bilingual.
If you get a mac tut, you have Command instead of control, and an Alt and an Apple button. Often, the Apple is used for shortcuts like Apple+I for info (changing names etc), Apple+Q to quit etc. But the app functions identical. You got two cards with your PS: one with Win shortcuts, and one with mac ones. Here you find all you need. (yet we know since 68 that the real answer is Love)
What you may not do on the mac is double click on the desktop because instead of opening a file, it closes the application.
What mac has as big advantage is the option to give your folders different colours. VERY handy for chaos creatures like me. Unfortunately, Win2K doesn't have these.