Is it possible to use the keyboard to control application menus in Mac OS 10.6 and later? I have tried CtrlF12 but it's not working for me. I am running OS X Lion.
Also is this acceptable use in OS X?
The easiest way to access the menu bar is to press CtrlF2 (or FnCtrlF2 if you have function keys disabled).
Type away the letters of the top menu items you want to access, and you're good to go.
Navigate with your arrow keys →←↑↓ and press ↩ to activate entries.
But, in order to get to the application menu, there's another pretty handy keyboard shortcut. Look in System Preferences » Keyboard » Keyboard Shortcuts.
This will focus your help menu, from where you can instantly search for menu entries.
This will significantly speed up accessing menu items by keyboard.
Why not? OS X has always been focused on using keyboard shortcuts, providing lots of possibilities for power users. Use them as often as you want. I do it all the time.