I have a 2011, 27in iMac w/ 16 GB of RAM. According to Apple this is the max RAM. According to OWC I can max out RAM @ 32 GB. Which one is correct? Would it be even worth it to me to upgrade to 24 or 32 GB? The biggest programs I use are iMovie and Aperture. Even with both open at the same time I still Have between 10-9 GB of RAM free. Is there any point for me to upgrade?