This article is from the MachTen & CodeBuilder FAQ, by Jaime Julca firstname.lastname@example.org with numerous contributions by others.
Yes. X11R6 with 24-bit color is available with Professional MachTen 2.3 and
also for Power MachTen via the Ported Application CD, Volume 2.
D5. What 3-button mice work under MachTen?
In general, Tenon's X Window Software can be configured to run with any
three-button mouse. We have the most experience with the Logitech MouseMan.
Customers have also reported that the Kensington 4-button mouse works well.
D6. Can I buy X separately?
Yes, if all you need is to have your remote X client applications display on
your Power Mac desktop, simply buy XTen.