iMac Intel 21.5" EMC 2428 (Mid 2011) Power Supplies
iMac Intel 21.5" (Late 2009-Mid 2011) Power Supply
Replace a malfunctioning or burned out power supply. Compatible with all 21.5" iMacs EMC 2308, EMC 2389, and EMC 2428.
In May 2011, Apple upgraded the 21.5" iMac. Externally, the machine features edge-to-edge glass and an aluminum rear bezel. Internally, an LED display, 4 RAM slots (to upgrade to a maximum of 16 GB RAM), more powerful video processing, and featuring quad Core i5 and i7 processors.