If anyone is still following this, here's mine out of interest. I'm only here as periodically like to see where things are at in way of speed - I'm working a model at the moment with loads of 3D vegetation components and it's seriously chugging along.
I've also wondered about the effectiveness of PC v Mac in Sketchup - i've got friends with PC who never seem to complain about it.

Hi guys,

This plugin has absolutely changed my life with Sketchup being a landscape designer, i use it all the time.
I do have a similar problem though to a previous poster and couldn't see a solution from reading through. Essentially, i select an area, a grass component and then generate and it throws components outside the selected area - see screenshot showing this and my Fur settings....