This model is powered by a 32 nm, 64-bit Intel Mobile Core i5 "Sandy Bridge" (I5-2415M) processor which includes two independent processor "cores" on a single silicon chip. Each core has a dedicated 256k level 2 cache, shares 3 MB of level 3 cache, and has an integrated memory controller (dual channel).
This system also supports "Turbo Boost 2.0" -- which "automatically increases the speed of the active cores" to improve performance when needed -- and "Hyper Threading" -- which allows the system to recognize four total "cores" or "threads" (two real and two virtual).
Also see: How fast are the "Early 2011" 13-Inch, 15-Inch, and 17-Inch MacBook Pro models compared to one another? How fast are they compared to the models each replaced?
System Bus Speed:
Cache Bus Speed:
2.3 GHz (Built-in)
256k x2, 3 MB
Min. RAM Speed:
Supports 1333 MHz PC3-10600 DDR3 SDRAM.
Also see: How do you upgrade the RAM in the "Early 2011" 13-Inch, 15-Inch, and 17-Inch MacBook Pro models? How much RAM of what type do they support?
4 GB of RAM is installed as two 2 GB modules, no slots free.
*Apple officially supports a maximum of 8 GB of RAM, but as first confirmed by site sponsor OWC, this model actually is capable of using up to 16 GB of RAM with two 8 GB memory modules.
HD Graphics 3000
This model has an Intel HD Graphics 3000 graphics processor that shares memory with the system.
Also see: What type of video processor is provided by the "Unibody" MacBook Pro models? Is it upgradable? Which models have "dedicated" and "integrated" video memory?
13.3" color widescreen LED-backlit TFT active-matrix "glossy" display with a 1280 by 800 native resolution.
Apple reports that this system also supports "1152 by 720, 1024 by 640, and 800 by 500 pixels at 16:10 aspect ratio; 1024 by 768, 800 by 600, and 640 by 480 pixels at 4:3 aspect ratio; 1024 by 768, 800 by 600, and 640 by 480 pixels at 4:3 aspect ratio stretched; 720 by 480 pixels at 3:2 aspect ratio; 720 by 480 pixels at 3:2 aspect ratio stretched."
2nd Display Support:
2nd Max. Resolution:
The maximum resolution supported on an external display is 2560x1600.
Also see: Are there any adapters or "hacks" that make it possible to connect a second external display to a MacBook, MacBook Pro, or MacBook Air model?
320 GB HDD
Std. Storage Speed:
2.5" (9.5 mm)
Serial ATA (6 Gb/s)
8X DL "SuperDrive"
802.11a/b/g/n (450 Mbit*)
SDXC Card Slot
Apple Order No:
Early 2011 13"
Apple Model No:
A1278 (EMC 2419*)
63.5 W h Li-Poly
X 10.6.6 (10J3210)
Apple MacBook Pro 13'' "Core i5" 2.5GHz 16GB 1TB OS X 10.10.5 Intel HD Graphics 3000 512MB Refurbished Ready to Use
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