Quickly Enter Clamshell Mode with an External Display in Mac OS X

OS X Daily
By Paul HorowitzJun 8, 2012, 11:48 am432 pts
Keeping a portable Mac turned on while the lid remains closed is commonly referred to as clamshell mode. This basically docks the MacBook Air/Pro/etc and allows the GPU to power an external display only which can help performance of some games and graphics intensive tasks. There are several ways to enter into…

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