Apple iMac 27" Desktop - 3.2GHz Intel Core i5 Quad-Core, 3TB Hard Drive SATA, 16GB 1600MHz DDR3 SDRAM, GeForce GT 755M Graphics 1 GB, Mac OS X Yosemite (64-bit) 3.2GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.6GHz) with 6MB L3 cache,NVIDIA GeForce GT 755M graphics with 1GB GDDR5 memory 27" HD LED-Backlit IPS Display, The screen has a 16:9 aspect ratio and Full HD 2560 x 1440 native resolution 16GB of 1600MHz DDR3 memory, Mac OS X Yosemite 3TB Sata drive, 802.11a/b/g/n Wi-Fi, Bluetooth 4.0, Two Thunderbolt ports What's in the Box: Apple 27" iMac Desktop Computer, Apple Wireless Keyboard, Magic Mouse, Power Cord, Mac OS X Yosemite Preloaded, iLife Preloaded (includes iPhoto, iMovie & GarageBand)