The iMac MB950LL/A Late 2009 Model has a 3.06Ghz Intel "Core 2 Duo" processor. That means two independent processor "cores" on a single chip. This machine packs: 4GBs of RAM; a 500GB hard drive; and has been installed with the latest Apple OS X El Capitan operating system.
A 21.5" glossy 16:9 LED-backlit TFT Active Matrix LCD (1920x1080 native) display
It also has a built-in iSight video camera and built-in stereo speakers
vertically-mounted Smart DVD, and NVIDIA GeForce 9400M graphics
Built-in iSight video camera
Connectivity includes four USB 2.0 ports, a Firewire "800" port, built-in AirPort Extreme, and Gigabit Ethernet, as well as a Mini DisplayPort, which supports an external display up to 30" (2560x1600).