Along the saturation my iMac (2.4GHz 300GB) was saved by this silent external hard drive, powerful and fast not to say dazzling (with Fire wire 800) ... a very reliable helper (to store such the full HD videos), designed for Mac (simplicissime time of installation: 2 ') and more of the same metal gray color, elegant and with a dipstick. A real success of Western Digital. That device manufacturers imitate and finally produce (further) for Mac! Excellent transaction Amazon.com