Hi there Brent
I have been using a IMac for years now it has Mountain Lion on it at the moment but it runs everything in my Observatory .
try down loading Sky Safari it is a excellent planetarium program and the Pro version has a great scope control .
the good thing with the Mac that I find is that it is not constantly updating and I can't remember the last time it crashed come to think of it I don't think it has .I run my Sbig 8300c and PHD guiding on it with no issues I also used my DSLR Canon 450d with Nebulosity 4 another great program for AP .
good luck with it Brent let us know how you go
cheers Pete
