IMac (20-inch, Mid 2009)

The iMac (20-inch, Mid 2009) is education-only which was released on 2009 for the 2.0 GHz model and 2010 for the 2.26 GHz model.

The firmware identifier is iMac9,1.

Operating System

 * First Release: (2.0 GHz) Mac OS X Leopard (10.5.7) / (2.26 GHz) Mac OS X Leopard (10.5.8)
 * Latest Release: OS X El Capitan (10.11.6)