mac compatible -- sort of...

Nice little drive. No set-up required. I would give it a 5 out of 5 BUT. . . WD bills it as Mac OS compatible. Strictly speaking, this is true. What they don't tell you and you don't find out until you're trying to back up your files is that this drive has the same restrictive naming conventions as PCs. The result is that unless you restrict your name length and don't use characters such as dash or backslash when labeling your files, the process stalls out and you have to rename each file individually. It's a serious PIA. I would recommend that anyone using Mac look elsewhere.

Great Hard Drive

I did not buy this drive, initially, because of the negative review, here! I bought the LaCie portable instead which was a big mistake --- its not near as good as this Western Digital. I bought my passport at BestBuy when it was on sale because it would be very easy to take it back. No need to take it back --- I love the drive, its smaller than the LaCie and has more capacity.

I have a MacBook Pro and it worked great right out of the box. I also have an old iMac G4 running Tiger and the old USB 1.1 --- I did not expect it to work here based on the reviews but to my surprise, it worked great on the old iMac --- I also tried it on my Play Station 3 and again it worked great.

I am so impressed by this little drive, that I will be buying Western Digital desk top drives when I replace my LaCie drives.