The header says it all. I have a 550 MHz Rev. B PowerBook G4 if this tidbit will help. I'm trying to determine if I can play WarCraft III on my Mac. Here are the minimum specs required as listed on Blizzard's website: Macintosh® OS 9.0 or higher/ Mac OS X 10.1.3. or higher: * 400 MHz G3 processor * 128 MB of RAM * 16 MB ATI Technologies or nVidia chipset 3D video card * 700 MB HD space * 4X CD-ROM drive BTW, this is my 100th post!!!