the late 2009 Model doesn't have a 3rd SATA on board, though is has the corresponding solder pads on the PCB. When I look in System Profiler, there's no 3rd empty SATA port shown (unlike in this guide, which applies for newer models).

Thus is seems there's missing more than a connector and two resistors to get a 3rd port. On the other hand i'm feeling challenged to dig deeper ever since i disassembled my iMac in order to realize I'm missing the port.

Does anyone knows more about this?

⟐ Edited April 26, 2013 at 1:44 pm -0700