I just upgraded with this drive a MacBook Pro (late 2011), because my built with Hitachi 500GB simply became too small. The conversion worked without problems, the drive fits perfectly and done for a good month without complaint their service. However, WD seems to be warmer than the Hitachi. But what is much more important for me, and also leads to a star deduction: the demand for electricity appears to be much higher. For battery operation so far I could get by without power cable good 6 hours now rather 4 hours.
