This mid-2011 iMac is model A1311 (iMac12,1). It has a 2.5 GHz Intel Core i5 "Sandy Bridge" processor, 4 GB of RAM (room for 4 GB more), a 500 GB Hard Drive and 8x SuperDrive DVD player/burner. Additional software includes Pages, Keynote, Numbers, iMovie, iDVD, iPhoto, etc. It is running Mac OS 10.11.6, but can go up to 10.13.x. But the OS software newer that what is on it doesn't run the iDVD making software as well. Comes with Apple keyboard and Logitech mouse. Plus, these models have tons of connections including audio in and out, 4 USB, FireWire, and Thunderbolt 1. Oh, and it has a remote for running certain software like Music and DVD Player. It is in great working conditions. I only accept cash only.