Apple’s new Mac Pro relies completely on external ports for expansion, with six Thunderbolt ports, four USB 3.0 ports, one HDMI port, and two gigabit Ethernet ports. The folks at Macworld Lab put the Mac Pro’s expandability to the test, connecting 36 drives with a combined 100.63 TB of storage capacity, as well as a number of other devices. Even then, the combined devices together drew only 865 watts — less than a common hairdryer. follow link
Quickly Navigate Up in the Finder
If you're in a Finder window and want to navigate up a level in the folder hierarchy beyond the currently selected level, simply press Command-Up arrow. (You can also Command-click the Finder window's title to pop up a menu of higher levels.)
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