I was trying to figure out what it's running myself, the person who got it for me even set it up before hand.

Processor 2.4 GHz Intel Core 2 Duo
Memory 4 GB 800 MHz DDR2 SDRAM
Graphics ATI Radeon HD 2400 XT 128 MB
Software OS X 10.9 (13A603)
I took that software number to google and it says something about Maverick but the source only implied it was.
I didn't know graphics cards could have a size either? Confused about what that means haha. 128MB seems low?