Okay, this is an odd issue. My MacBook simply does not get along with one specific DVD, and I can't figure out why. It's the third disc in a set of four (First 13 episodes of Glee on DVD -- don't judge), and the others play perfectly. The disc is flawless, as far as I can tell, but for some reason, my MacBook won't recognize it. When I put it in, it sounds like the disc is trying to spin but can't. It does this for about ten seconds and then it gets spit back out. The DVD will play anywhere else but the MacBook and the MacBook will play anything else except that DVD. I would just accept that this DVD and my Mac will never be friends IF it was just a stand alone DVD, but like I said, it's from a set of four. They should all be in the same format/region/what have you, right? Has anyone else experienced this? It's totally bugging me.