I have a Mac OS X 10.5.4 2 GHz Intel Core 2 duo with 1 GB 667 MHz DDR2 SDRAM memory (im not sure if thats important)

I would like to buy Myst but Im not sure if there is a myst or riven that will work on my computer. can someone help?

The updated version of the original Myst, called Myst Masterpiece, runs nicely under Classic on my PowerMac G5 (Mac OS X 10.4.11). On the Intel Mac, you might have to use Parallels and run it under Windows... not sure. The original Myst (1993) does not run under later versions of QuickTime, which is one reason Myst Masterpiece (2000) would be necessary.

You might find this website useful.

Or this one.

Or you could just buy an old Mac box online for about $100 and load OS9 and play the originals