This is an apple macbook pro 15" (retina, late 2013 model). It has a 2.3 GHz quad-core intel core i7 processor, 16GB RAM, 1TB SSD. Unusually, it has a NVIDIA GT750M GPU with 2GB of RAM, as well as the integrated Iris graphics 6100 (less power consumption). It has been upgraded to a clean install of MacOS Big Sur; note that it cannot be upgraded any further without some hacking. The battery has been replaced by Apple on August 12, 2021, and currently has full charge capacity (mAh): 8214, with only 22 full charging cycles. The computer comes in its original box, with its power supply. This has been my primary machine since 2014, and I'm upgrading to an M1 macbook pro now for professional reasons (need more SSD space, processor and RAM were otherwise enough). Please only bid if you are within the continental US, as I am unable to ship abroad or outside of the lower 48. All sales are final, no returns. Thank you for your interest!