Processor Intel Core 2 Duo 2.53 GHz Multi-Core Technology Dual-Core 64-bit Computing Yes Data Bus Speed 1066 MHz Cache Memory Type L2 cache Installed Size 3 MB RAM 4 GB / 8 GB (max) Technology DDR3 SDRAM - 1066 MHz Memory Specification Compliance PC3-8500 Form Factor SO DIMM 204-pin Configuration Features 2 x 2 GB Storage Controller Type Serial ATA Serial ATA Interface Serial ATA-150 Storage Hard Drive 250 GB 5400 rpm Optical Storage Type DVD±RW (±R DL) - integrated Read Speed 24x (CD) / 8x (DVD) Write Speed 24x (CD) / 8x (DVD±R) / 4x (DVD±R DL) Rewrite Speed 10x (CD) / 4x (DVD±RW) Display Type 13.3" TFT Max Resolution 1280 x 800 ( WXGA ) Widescreen Display Yes Features LED-backlit, glossy Data Link Protocol Ethernet, Fast Ethernet, Gigabit Ethernet, IEEE 802.11b, IEEE 802.11a, IEEE 802.11g, IEEE 802.11n (draft), Bluetooth 2.1 EDR Compliant Standards IEEE 802.11b, IEEE 802.11a, IEEE 802.11g, IEEE 802.11n (draft), Bluetooth 2.1 Expansion Slots Total (Free) 2 ( 0 ) x memory - SO DIMM 204-pin Interfaces 1 x network - Ethernet 10Base-T/100Base-TX/1000Base-T - RJ-45 1 x IEEE 1394b (FireWire 800) - 9 pin FireWire 800 2 x Hi-Speed USB - 4 pin USB Type A 1 x display / video - Apple mini-DisplayPort 1 x audio - SPDIF output/headphones - mini-phone 3.5 mm / TOSLINK Operating System MacOS X 10.5 Leopard