Done in 2018, on a PowerBook G4 Titanuim 1Ghz running Tiger and used Blender 2.56-beta PPC, Gimp 2.6.11 PPC (running in Apple's X11), the rendered 1024x1024 PNGs icons were then converted to Tiger compatible icns icons with Pic2Icon 1.3 .
https://macintoshgarden.org/apps/replatinum