I will not work on a Mac, luckily my wife has a PC so I could get it done. I just finished the course, I figure it took me about 60 hours to do it. It takes time to go through the material, take notes, and then pass the exam. There are 30 general subjects, each with an exam. The systems portion has I believe 12 or 14 subjects, then 1 systems test. I actually got a lot out of the course, it was a good review.