** AS IS ** This computer has no hard drive and has been heavily used.
The MacBook Pro "Core i5" 2.53 15-Inch (Mid-2010) is powered by a 32 nm, dual-core 2.53 GHz Intel "Core i5" I5-540M (Arrandale) processor, with dedicated 256k level 2 cache for each core and an 3 MB shared level 3 cache. This system also supports "Turbo Boost" -- which "automatically boosts the processor speed based on workload" up to 3.06 GHz for this model -- and "Hyper Threading" -- which allows the system to recognize four "virtual cores" or "threads."
By default, it is configured with 4 GB of 1066 MHz DDR3 SDRAM (PC3-8500) installed in pairs (two 2 GB modules), and dual graphics processors -- a NVIDIA GeForce GT 330M with 256 MB of dedicated GDDR3 memory and Intel HD Graphics with 256 MB of RAM shared with the system -- that Mac OS X automatically switches between for better graphics performance and better battery life, respectively, depending on application use.
The standard configuration of this model has an LED-backlit 15.4" widescreen TFT active-matrix "glossy" display (1440x900 native resolution), but it also is available via custom configuration with a "high-resolution glossy" 1680x1050 display and a "high-resolution antiglare" 1680x1050 display for an additional US$100 and US$150, respectively.
Connectivity includes AirPort Extreme (802.11a/b/g/n), Bluetooth 2.1+EDR, Gigabit Ethernet, a Firewire "800" port, two USB 2.0 ports, optical digital/analog audio in/out, a "Mini DisplayPort" that supports an external display at 2560x1600 (it also passes an audio signal), and an SD card slot. It lacks an ExpressCard/34 slot.