This chipset, also known as the Mach64 GX, is very nearly the same chip as the 3D Rage II, and was ATi's first chip to feature hardware accelerated 3D. Unlike the S3 ViRGE, the Rage II and Rage Pro really did succeed in making 3D operations faster, and were fairly nice cards for their day, especially considering the price.
PCs used them extensively, as did several models of Macintosh, and surprisingly, also Sun Microsystems. The Sun Ultra 10 and Ultra 5 had an onboard 3D Rage II in early revisions, and a Rage Pro in later ones. However, neither Solaris nor Linux are capable of using the 3D acceleration features of the chip. Sun also sold an add-in PCI graphics card, called the PGX64, which featured a Rage Pro chip with 8MB of RAM. Alas, the 3D functions don't work on this card, either. Interestingly, the PGX64 can be used successfully in a Macintosh, if and only if you have some other card as well. (This is because the Sun Fcode is almost but not quite compatible with Apple's OpenFirmware, and therefore works, but only once the OS is loaded.)