##Mac OS X
Close : CMD + W (close current Window or Tab)
Quit : CMD + Q (quit current qpplication)
Open folder : CMD + Down Arrow
Close folder : CMD + Up Arrow (same as going one level up in directory)
Open File : CDM + Down Arrow (same as opening a folder)
Open folder in new window : Select + double click
Rename File/Directory : Enter
Maximize Window : CMD + CTRL + M (configured in keyboard preference)
New Tab : CMD + T
URL bar : CMD + L
Move to next tab : CMD + Shift + ] or CTRL + tab
Move to previous tab : CMD + Shift + [ or cTRL + Shift + tab