Hi John, I don't have an answer right OTTOMH, but the 10.5.3 update might make a difference ( it was a major update ) Assume your results with SimpleBlocks demo are FB-compiled and not FBtoC-compiled. Right. I'm still new to 10.5.3 ( and 10.5 in general ), so I can't offer any suggestions. If not for the purchase of a new iMac a few weeks ago, I probably would have delayed my upgrade to 10.5. Brian S On Jun 8, 2008, at 9:23 AM, John Grimsley wrote: > Hello out there, > > When I upgraded from OS X 10.3.9 to 10.5.2, the frame rate of my > OpenGL app dropped in half. This is an FB question but may also > apply to FBtoC. I don't have 10.4 access on the same machine. > > When I compile the SimpleBlocks Demo and just launch it, I get 140+ > fps under 10.5.2 but 200+ fps under 10.3.9. (I bypassed the 60 Hz > limiter). I am using the same setup of Millions of Colors and 1280 > x 800. I applied the 10.5.2 'Graphics Update' but no improvement. > > Any ideas for performance improvements under 10.5? > > > Thanks, > > John G > iMac G5 1.8 GHz, 512 MB Ram, 64 MB VRAM GeForce FX 5200, OS X 10.3.9 > & 10.5.2 > > -- > To unsubscribe, send ANY message to: futurebasic-unsubscribe@... > Brian S.