What's the rationale behind having a function, control, option, and command key on a Mac? Is there a rhyme or reason to the keyboard shortcuts, or are they just a new permutation
SOLVED: My left shift, control and option keys stopped working - MacBook Pro 15" Unibody 2.53 GHz Mid 2009 - iFixit
![That Time I Had to Reset My MacBook Pro's SMC to Slow Down the High-Speed, Whirring Fan – Juan Monroy That Time I Had to Reset My MacBook Pro's SMC to Slow Down the High-Speed, Whirring Fan – Juan Monroy](http://juanomatic.net/wp-content/uploads/2015/03/resetkeyboard-640x320.png)