This may sound like a stupid question but bare with me here. The Ubuntu computer next to my mac pro has a problem with wireless so I share my internet from my mac pro to it via ethernet. I have to download a large 20 gig file that will take about 2 days, on my ubuntu computer, and Im going to boston so lets say 4 days. Is it safe to leave my mac pro running for over 4 days straight? I don't want to overheat or anything. Thanks. I just love my mac pro and I want it to last, so I always ask before I do. With my dell on the other hand, I could careless.