Hello, I purchased a Seagate 500GB external drive for my father to use for Time Machine backups. I can't find anything conclusive on whether I need to monkey around with the partitions in disk utility, or just send him home with it and let him say "yes" when he plugs it in and OS X asks if he wants to use it with Time Machine. Apple's knowledge base has an article that makes a passing statement that "GUID Partition Table (GPT) or Apple Partition Map (APM)" is recommended- but it pretty much stops there. Should I do something to this drive before giving it to him to take home, or shouldn't I? I mean, either it is compatible as-is, or it isn't, right? I appreciate your help of this one.