I am looking at the master collection, I will be taking Adobe photoshop & Adobe illustratoor in the spring, & will need this software on my macbook pro. I can get a very good discount at student pricing, & would like to take advantage of it. however, it will still take a good bite out of my money, & read about the general return policy of student version software. It is basically, nonreturnable once I open the software wrapping & box with the discs. So I would like to get some input from others who may be using these programs on their macs, & their experiences, as I am nervous about it. I need help to make an informed decision before I take the plunge & buy the software. I want to be sure it will run ok/reliably on my mac before my classes start, (they are online classes), because if the CS5 versions do not run well, I will have to drop the online classes & take them on campus on their computer labs. My classes will start Jan 24th 2011. I have tried downloading the trial version onto my mac, but it kept quitting, & I would get error messages. I am on an i7 2010 macbook pro 15 inch antiglare Snowleopard with 4gb of ram.