My 2009 Macbook Pro (OSX Version 10.5.8) desperately needs to be updated to Snow Leopard (and then Maverick). Problem is, I bought the mac in the US and now live in Europe, so I ordered the Snow Leopard update package from the German store not realizing that it's a DVD rather than a CD. I've read that my computer is supposed to ask what region I'd like to use when I insert a DVD. However, my computer just makes a weird, repetitive buzzing noise for a few seconds and then spits the DVD back out. Could this be a region issue? If so, how can I manually adjust the region setting?