Please read my entire post before answering, thanks! I would like to install a Sata III SSD in my OptiBay and I need to know if it is possible. If I understand correcly, the history of SATA and the 2011 MBP is as follows: 1. Early 2011 MBP comes out with SATA III hardware on the Main Bay and SATA II hardware on the OptiBay, but SATA III didn't work on either bay. 2. Apple releases a software update that enables SATA III capability on the Main Bay of early 2011 MBP models. 3. Apple quietly started including SATA III hardware on the OptiBay for Late 2011 MBP models. However, SATA III speeds are only working on 13" models due to EMF issues on the 15" and 17" models. My Question(s): 1. Does anyone know if apple fixed the issue via software as they did in the Main Bay? I am currently running OS X 10.11.5. 2. If I have a late 2011 MBP that came with the SATA III cable in the OptiBay, can I install a SATA III SSD in the OptiBay? 3. If the issue hasn't been fixed: Will I just get SATA II speeds on my SATA III drive, or do the EMF issues render SATA III drives useless in my 15" late 2011 MBP?