While most external hard drives can be used either for PC or Mac, they must be formatted correctly, and are often pre-formatted for PC or require a special setup. A few manufactureres have created terabyte harddrives that are ideal for Macs- these drives are not only pre-formatted for Mac use, but have stylish designs that are meant to compliment the look of Mac computers.

The Iomega Ultramax is ideal for Mac users, though it is compatible for PCs as well. It has an attractive, modern design that is made to compliment newer Mac systems. The "dual" version has a Firewire 400 and USB 2.0 interface, while "quadruple" has eSATA, Firewire 800, Firewire 400 and USB.

Western Digital Mac Edition comes pre-formatted to work with Mac computers. Simply plug it in and it is ready to go. It connects via USB 2.0 only (no firewire or eSATA,) and comes in versions up to 2TB in size. This drive also automatically turns itself on or off with your computer.

Western Digital MyBook Studio Edition is pre-formatted for Mac computers and has a design style to compliment them. It is able to connect via USB 2.0, FireWire 400, FireWire 800, and the 3Gb/s eSATA interface, and is marketed is WDs solution for demanding, creative professions like video editing. It also features the heat, power and energy saving features of the home edition as well as the power on/off sync.