One of the fascinating little projects bubbling about on the MacRumors PPC forum has been an optimization of Leopard for PowerPC Macs called Sorbet Leopard.
I’m going to be clear – I’ve been following the thread, and some of it seems a little goofy. I am certain there are legit opportunities to optimize such an old OS, but your mileage is likely going to vary. The author/instigator/coder also did some work with a preference file intended to optimize TenFourFox, but I found that the optimizations made no different on my G5. Again, your mileage may vary.
Still, it’s fun to see such enthusiasm for our ancient PowerPC Macs.
Give Sorbet Leopard a shot. I’ll be taking a peek at it this weekend and seeing if it truly lives up to the hype as a fabled 10.5.9 update to our beloved Macs.
Here’s the link: https://macintoshgarden.org/apps/sorbet-leopard