Leopard is the newest Mac OS X for PPC, but in terms of browser support it's nearly identical to Tiger, iirc. Not much of a point in installing it, and if you have a 12" PowerBook I've found that Leopard messes the color profiles up so bad that the screen looks sepia-tone.Tks for your prompt reply. Which alternate OS can I install which runs smooth and I can watch Youtube better and browse the net faster. I see many guides on various OS but nothing seems perfect. Linux has its own hassles of sound etc not working.
Linux is probably the best option, MorphOS and OpenBSD might be decent but I've never tinkered with them much. I'm pretty sure Linux performs great once set up, but be sure to max out your RAM.