I've finally found a launcher to get Minecraft (1.5.1) running on my Powerbook G4 (1.25gigs of ram, Radeon 9700 64mb), but the only problem is; the game's performance is dreadful. Starting and playing a singleplayer creative map, I'm getting 1-5 fps. I've also tried installing Optifine (light and ultra) and turning the settings much much lower, and even those don't improve any matters. I have read however that running multiplayer does improve the performance by quite a lot, although, I don't know of any still existing 1.5.1 servers. Anything I can do to get a playable frame-rate? Thanks.