Another mac user here willing to give it a go, specs are as follows
27" imac 3.4GHz i7
24GB RAM
GPU is a 680MX
could load it on a 17" macbook pro 2011 model w/16GB RAM or a 13" 2012 macbook pro with 16GB ram as well
Im still new to long range shooting, so wont be able to provide much feedback...