My company has been moving me more and more into maintaining our Macs. My background is in PCs I currently repair the hardware and I work on Windows and Linux. My company wants me to certify on Apple which I was told is three exams OS, desktop, and portable. I need more information on the exams and where to get study materials. I know there are some materials on the Apple website but I do most of my reading on the train to and from work any help would be greatly appreciated.