Hi Frank,
I have reduced everything (HDR, antialiasing, cloud draw distance) and I am still getting poor frame rates and crashes. The strange thing its I show 8-11 GB of Video memory available. I also tried shutting down Safari and even with 8 or 9GB of RAM available I still had the same issue. I also have tried by removing all the custom scenery. A couple of years ago when I posed a question someone said that the amount of available VRAM and RAM available shown on the SkyMaxx screen may not be accurate on the MAC. I love SkyMaxx too much to give up!
Andy
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