Love the programme, have done for many years now, but having recently changed to a Mac, I can't believe how poor the alignment and support for Mac operating systems is. Basically, if you want to keep your OS updated, then you need to be running a 2 or 3 year old version of sketch up. I'm currently working on the basis of 2 bug splats per hour of use. On getting help from sketch up support, I was more or less told, "you have to go back a couple of versions of sketch up to be compatible with a modern Mac. It's akin to buying a new car, and being told it won't work on modern fuel!! It just seems like basic stuff that should be sorted long before it goes to market. And from looking up on forums, the particular issue I'm having is a year old problem at this stage, so its safe to presume that up to date support is just not a concern at sketch up. Pity.