esther, I've had the same trouble with Poser native import -- it can take Carrara forever just to open a file with numerous native-imported objects (even when the file's as small as 36M), and making changes is possible only through entering information by keyboard, because Carrara can't keep the display synched up with mouse operations fast enough. I've tried pretty much everything, and nothing significantly helps. I'm beginning to wonder if this is another Mac issue somehow...