Summary: Bought this for my Dad to use with Time Machine on his Macbook Pro to backup video content he has to review for work. The drive has an enormous amount of space and once setup with time machine it automatically backs up his internal drive, perfect for him as he is not a big techie.
Summary: I do not use this external for backup for my Mac Book. Rather, I use to house my iTunes library which is huge. I've already used 1/2 tb and have easily that much more to add. And that is before I convert my vinyl collection. Using an external hard drive gives me the best solution.
Summary: Earlier I incorrectly stated that it will NOT work when plugged into a USB 3 port. It turns out that the problem was with my computer and not with the drive, hence I've updated my review to 5 stars. WD seems to have solved the overheating problems that were common with the earlier My Book devices.
Summary: I bought 2. I keep one in a fireproof safe, and use the one to pass around several different work stations. Never ran into any issues, it has fallen from standing upright to its side several times while on without resulting in any issues. Very durable, solid piece of equipment.
Pros: Idiot proof. Format from computer management before use. Manufacturer firmware prevents you from ever bricking the USB components necessary for comm between PC or Apple. Since I purchased this in 2011 (now 2013) I have disconnected the power via cable no less than a bajillion times; with no fail.
Cons: I have a corner unit desk, the power supply cable could stand to be another foot and a half or 2' longer. But no reason to knock off any eggs just because I have a large work station.
Summary: These are good drives for the Mac. They are essentially plug and play. Plug them into a USB port and you're up and running. I have three of them at home. Two are backup drives for two iMacs and the other is a backup drive that I don't run in case one of the drives crashes.