I'm looking for a external hard drive to buy. Every single hard drive I have googled so far, if they also have mavericks osx, there are many threads saying the hard drive keeps unmounting. I do not want to waste my time and money. So I am looking for a drive that does not unmount when the computer sleeps or is restarted. Does your hard drive stay mounted? Do you also have Mavericks installed? If so please post your model type. PS I need a 3 TB USB 3.