The 4GB my mid-2010 13″ MacBook Pro came with just wasn’t cutting it for me anymore so I picked up a couple of 4GB DDR3 1333MHz sticks for about $40. If you’re like me, you don’t tend to pay too much attention to the nitty-gritty details of something as trivial as a RAM upgrade. Of course, I knew that my model MacBook Pro only supports up to 1066MHz DDR3 RAM, but I assumed that the faster RAM would downclock itself to match the 1066MHz limitations of the MacBook Pro itself. Unfortunately, this was not the case and when booting with 8GB of RAM, my Mac’s loading indicator would freeze when booting the OS.
I created a video on the whole process which you can view below, or alternatively click the Read More link to view a more concise version in this article.