Hello there. I have also a question concerning 1600 mhz memory. I have an i5 Mac Mini late 2012 which i will be upgrading with 2 sticks of this: https://maxict.nl/product/3530904/crucial-ct51264bf160bj-pc3-12800-4gb My dad has an i5 Mac Mini mid 2011 with the basic 2 gigs from Apple. Can I put my basic 4 gigs from my mac into the mac of my dad? I saw the specs were different: 2012: http://support.apple.com/kb/HT5475 2011: http://support.apple.com/kb/HT4805 Thanks for your help!