OS X Yosemite version 10.10 Oct. 2014
Mavericks version 10.9 Oct. 2013
mac specs by machine model machine
apple authorized reseller
The Air wins this round because it’s thinner and lighter
The Pro’s Retina display blows the Air’s 1440 x 900-pixel panel out of the water
an HDMI port and an SDXC card slot. This means that the Pro can support up to two monitors at 2560 x 1600, as well as an additional monitor at 1080p. The Air can only support one external monitor
Processor and Memory:
Air comes with a 1.4-GHz Core i5-4260U processor, 4GB of RAM, 128GB of PCI Express storage, and Intel HD 5000 graphics. The 13-inch MacBook Pro, by comparison, features a 2.6-GHz Intel Core i5-4278U processor, 8GB of RAM
The 13-inch Air lasted 12 hours and 50 minutes on the LAPTOP Battery Test (Web surfing via Wi-Fi).
The Pro lasted 10 hours and 44 minutes,
least expensive version of the 13-inch
Air costs $999 and comes with a 1.4-GHz Intel Core i5 processor, Intel HD Graphics 5000, 4GB of RAM and 128GB of flash storage.
The Pro with Retina display starts at $1,299 and includes a 2.6-GHz Intel Core i5 processor, 8GB of RAM, 128GB of flash storage and Intel Iris graphics.
The more expensive version of the Air costs $1,199 and has the same processor and RAM as the starting version, but comes with 256GB of storage.
http://www.trustedreviews.com/opinions/macbook-pro-vs-macbook-air - 2 air models
http://www.macrumors.com/guide/which-macbook-to-buy/ - You're going to want to choose a Retina MacBook Pro if you're big on gaming
http://www.techtimes.com/articles/38970/20150312/macbook-2015-vs-macbook-air-vs-macbook-pro-whats-the-best-macbook-to-buy.htm - Get the MacBook Pro if you're a heavy user with processor-intensive tasks, but if you're like most people, and your computing tasks consist mainly of typing and web browsing, get the MacBook instead