- Model: iMac Retina 4K, 21.5-inch, Late 2015 - Processor: 3.1 GHz Quad-Core Intel Core i5 - Memory: 8 GB 1867 MHz DDR3 - Graphics: Intel Iris Pro Graphics 6200 1536 MB - OS: Monterey Version 12.7.6 Boot-up is getting slow, but it was used without problems for watching videos, internet browsing, and working online with Google Docs and spreadsheets. Contents: Main unit, keyboard, mouse, power cord, and other items like screen wipes, stickers, and quick start guide. (Lightning-USB cable for connecting the keyboard and mouse is not included) There are no scratches on the main unit's LCD screen, but there are some areas around the edges that are whitish due to not being able to be wiped off with alcohol. The mouse and keyboard show signs of wear and tear. The cords also have noticeable stains in places. Box included. Non-smoking environment, no pets.