I have for some time been looking for an opportunity to upgrade my Macbook Pro by mid-2010 and to make faster. The first step was the installation of an SSD instead of the normal HDD, which has brought a significant speed boost. But first the Einbauch these memory modules has really brought in combination with the SSD. With 8GB I had always the problem that the scrolling or certain processing steps have hammered through "reflection" of the computer. After installation of the 16GB is the story. Adobe Lightroom, Capture One (definitely need 16GB on the Mac), Photoshop and Co. go smoothly, that it's a pleasure. According to Apple are in this notebook only 8GB possible, but there is a program in which, after all serial numbers System information gets (Mactracker for iPad) and there I could see that 16GB with no Apple store are possible. Looking after I came across Global Memory. In short, I ordered the bar and was once positively surprised, because I was asked by the supplier according to the serial number and other system information of my Mac. Sent information, then it took another 4 days and the memory were the postbox. Of course, I immediately installed and what can I say, my Mac has so without any problems works instantly, the memory were detected correctly and now i put my Macbook USING a few more years. This investment is always worthwhile. Clear recommendation!