Comes with High Sierra installed.
2.8GHz Intel i5-760 1st Generation/ Radeon HD 5750 graphics (16GB Model)
3.2GHz Intel i5-680 1st Generation/ Radeon HD 5670 graphics (8GB Model)
Mouse and Keyboard included.
Every computer comes with a 90 Day Warranty!! Extend it another 6 months, for an additional $30 at checkout!!