Just curious really. "The X Window System (X11, or shortened to simply X) is a windowing system for bitmap displays, common on UNIX-like computer operating systems." https://en.wikipedia.org/wiki/X_Window_System The X11 install option was on the OSX install disks until Mountain Lion (with xQuartz instead), available for the Unix-literate. GIMP needed X11 before its OSX port. I'm sure the average Mac-user never even had a use for X11. I've installed it with Tiger but haven't booted into it. We can google what X11 is and how to use it but anyone here wanna offer up your own compelling PowerPC X11 advice or screenshots? EDIT: I'm taking a look at these two web pages. The first one was "Last modified: Tue Dec 18 09:11:44 PST 2007" so there may be some dead links. Using Mac OS 10.4 Tiger with X11 and fink: http://pages.uoregon.edu/noeckel/TigerG4G5Setup.html The Fink F.A.Q. http://www.finkproject.org/faq/index.php?phpLang=en I'm posting this EDIT from my Sawtooth AGP [1GHz upgrade 2MB L3 cache, 2 GB RAM] and TenFourFox feels like it's painfully giving web-page-birth compared to my MacPro, LoL.