I'm sorry, I never 1-star a review on just one criteria, but with Smaller, I just have too.
I'm on a MBP Core Duo running OSX 10.6.5 and I can't run the software because my Mac is not compatible? The minimum requirements are OSX 10.6, so that only leaves a lack of support for 32-bit processors.
Really? A simple tool like this can't be made to run on an Intel 32bit system? Really? That is egregious... hence the 1-star...
Again, my apologies for the callous rating, but in this case, I think it deserves it...