Memory and storage: With 8GB RAM and 512GB SSD. Screen size: 21.5". Processor: 2.7GHZ Intel quad core processor with VIDIA GeForce GT 750M GPU. Accessories: Includes a wireless keyboard and mouse. Operating System: macOS 10.13 Apple iMac: Get a refurbished Apple iMac. Compatible with: Mac OS High Sierra operating system (released in 2017). 21.5 Apple iMac Computer Quad Core | 8GB | Living Social