After trudging through five years of Windows, and not liking it much, I'd like to switch to Apple. I want to buy the 24" iMac, but am not certain when to make the move. The salesman in an Apple dealership here told me that it wasn't worth waiting for OS X Leopard, because applications that now work on Tiger might not work on the new operating system, at least until the application manufacturer updates the product. Is this really true? In my case, could it really be true that the Mac version of the musical notation software Sibelius, which was produced for Tiger, might not work on Leopard? And that I'd have to wait for the Sibelius people to update the software, something I cannot do? Maybe I should visit another Apple dealership. The salesman also told me, against everything I have read on the Internet, that Apple was planning to stop development on iwork. Would iwork 7 work on Tiger? Anyway, the Apple machine is beautiful; after playing with it for an hour in the shop the operating system seems a wonder. I was going to wait until Leopard came out, but now I don't know. I've no experience with Macs, and am certainly not technically-minded. I hope someone can tell me whether the salesman was right or just trying to sell me a machine.