After installing the Seagate (Laptop SSHD ST1000LM014 Internal Hard Drive 1TB, 8GB flash memory, 6.3 cm, 2.5-inch, 5400RPM, 64MB cache, SATA) a month ago started my Macbook Pro Mid. 2009, only slightly faster than before with a WD 1TB (5200 U / min) - in slow rd. 58 seconds ... So frustration. Until me a technician at GRAVIS advised, just do it again to play Mountain Lion from my purchase in the App Store new about it to dispose of the garbage. Takes everything just under 40 minutes. The Miracle: The Seagate launches now in 17.8 seconds !! All major programs come in seconds, the SSD in my MacBook Air starts just a little faster. Saved money, strong buy recommendation !!!!