Model

A1311

Brand

Apple

Operating System

macOS 10.13 High Sierra

Used (one owner) iMac: 21.5-inch/Mid 2011 I upgraded it to macOS 10.13.6 (High Sierra). Does NOT INCLUDE keyboard or mouse. Any USB or Bluetooth keyboard and mouse should work. It’s an older model but still works great. In recent years have been using as a 2nd monitor to MacBook. Display: -21.5-inch (viewable) LED-backlit glossy widescreen TFT display with support for millions of colors -Resolution: 1920 by 1080 pixels Processor: -2.5GHz quad-core Intel Core i5 Memory: -4GB (two 2GB) of 1333MHz DDR3 memory. Configurable to 16GB. Graphics: - AMD Radeon HD 6750M graphics processor with 512MB of GDDR5 memory 2.7 GHz Video Support and Camera: -FaceTime HD camera -Simultaneously supports full native resolution on the built-in display and up to a 30-inch display (2560 by 1600 pixels) on an external display -Support for extended desktop and video mirroring modes Audio: -Built-in stereo speakers -Two internal 17-watt high-efficiency amplifiers -Headphone/optical digital audio output (minijack) -Audio line in/optical digital audio input (minijack) -Built-in microphone -Support for Apple iPhone headset with microphone Connections and Expansion: -One Thunderbolt port -Mini DisplayPort output with support for DVI, VGA, and dual-link DVI (adapters sold separately) -One FireWire 800 port; 7 watts -Four USB 2.0 ports -SDXC card slot -Slot-loading 8x SuperDrive with 4x double-layer burning (DVD±R DL/DVD±RW/CD-RW) -Audio in/out -10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector) -IR receiver -Input Wi-Fi: -802.11n Wi-Fi wireless networking;2 IEEE 802.11a/b/g compatible -Bluetooth -Bluetooth 2.1 + EDR (Enhanced Data Rate) wireless technology