Apple MacBook Pro mid 2012 Retina 15.4" 256GB SSD 8GB RAM 2.3GHZ i7 Quad-Core Mac OS Catalina 10.15.1

Used. A few dings and marks on the body (I took pics of the more noticeable ones) but cosmetically, it's still in good overall condition. Works flawlessly. Like most Macs from this generation, you sometimes encounter image persistence but if it's an annoyance for you, it's an easy remove:

https://support.apple.com/en-us/HT202580