On my Mac Desktop the shortcut to show all open windows is F10 I believe, well on my MacBook Pro F10 is to illuminate the keyboard. Everything I'm finding on google is saying F3, F9, and F10 those either do the keyboard or the volume. F11 will hide all windows..... F12 goes to the dashboard. help?
-> About this Mac. Then you can click More Info to find out the year the laptop was made. Here is mine for example, its the Retina MBP.