Android Studio editor shortcut keys on mac

Auto Format:
Command+Option+L

Comment/Uncomment toggle:
Command+/  (/ is forward slash)

go back to last visited line
Command +[

Go forward last visited line
Command + ]

Indent 
<TAB>

Reverse Indent
Shift + <Tab>

Show and add the override methods from the base class
Control + O

If a class name does not import the package automatically, edit the class name to trigger the auto import.