Apple Certified ST3250820AS SEAGATE Barracuda 250GB Hard Disk Drive SATA II 7.2K 3.5'' HDD 655-1357B 9BJ131E-042

Apple Logo manufactured by Seagate for Apple iMac systems. Fits 21.5" 2009/2010/2011 A1311 and A1312 2009-2011. A1224 and A1225 2007 - 2008 iMac systems among others. Has 4pin connector at rear of SATA port for temperature sensor.

Apple Part No. 655-1357B
Seagate P/n. ST3250820AS 7200.12 (9BJ13E-042)
Size of Memory: 320Gb
Buffer Size: 16mb
Drive Speed: 7200rpm
SKU:P8R-AP637 
Compatability: iMac A1311/A1312 2009/2010/2011 A1224/A1225 2007/2008/2009 **
** Please be aware that this Seagate 7200.12 Hard Disk (ST3500418AS) although has the same part number as many other Seagate drives this is an Apple approved drive with the Apple Part Number on 655-1564D and has the connection on drive for the HD sensor, by using non-Apple approved your fans will spin at full speed and the iMac will be too noisy to work comfortably with**
Apple approved drives are designed for Apple and work seamlessly with iMac and Mac Pro systems.