I just bought RCT3 last night ... bad news is I didn't realize it didn't have a universal binary update. As you may already know the game runs very crappy on intel. In most cases, unplayable. I found a few tweaks that help a bit. You still end up with low FPS, but the 30 second delay in placing objects is generally gone. However, placing coaster is still a huge "lag spike". Try some of the following. This was tested on a 17" MBP. - Disable shadows - Disable clouds, background mountains, etc. - Lower texture quailty. You don't want it maxed out, 60% seems to work well. - Put all other object quailty at around 30% - 40%. I personally put tracks at around 75% - Disable texture compression - Disable anti-aliasing For very simple parks it runs good. If you have a large park, you will start watching a slide show. I am curious if anyone has good results on the above. If you find anything else that helps tweak, let me know I really hope they released a UB of this game.