iMac Core 2 Duo 20-Inch featured a 2.4 GHz Intel Core 2 Duo processor (two processors on a single chip), 1 GB of RAM, a 320 GB Serial ATA hard drive, a slot-loading DVD+R DL SuperDrive, a built-in iSight video camera, and built-in stereo speakers. The screen was a 20-inch glossy TFT Active Matrix LCD at 1680×1050. Ports included three USB 2.0 ports, a Firewire 400 port, a Firewire 800 port, Gigabit Ethernet, and mini-DVI. It also included built-in AirPort Extreme.
The exterior aluminum case had a black plastic back. The iMac Core 2 Duo also shipped with a matching aluminum Apple Keyboard with a design similar to the keyboard on the MacBook at the time.