I have mid2012 MacBook Pro (MacBook Pro 9,2). To upgrade 4gb memories, I have bought OWC memory in this link. I installed them last night. When I look about this Mac window, I can see 16gb memory. However, in system information, there isn't any information about memory' supplier, part and serial number. Are they original or not? I am keeping invoice. If they are not genuine, I will return them.