full screen shot - cmd, shift, 3
select screen shot - cmd, shift, 4
close window - cmd, w
close tab - cmd, t
close program - cmd, q
“alt tab” - cmd, tab
log out - cmd, shift, q
“ctrl alt del” - cmd, opt, esc
reboot - cmd, ctrl, eject
shutdown - cmd, opt, ctrl, eject
option boot - hold option
clear pram - cmd, opt, p, r
clear sm. - left shift, ctrl, opt, power
find - cmd, f
spotlight - cmd, spacebar