How to choose exactly the keyboard layout that you need under Mac OS?

Question

Keyboard

I want to make a choice of Russian / English right / left shift / apple / viola. The problems of hanging this event (while maintaining the main function) can be solved using KeyRemap4MacBook. However, I came across the fact that it is impossible to choose any layout on Mac OS directly.

Answer 1

Something like this through Apple Script, for example:
...
on changeKeyboardLayout(layoutName)
tell application "System Events" to tell process "SystemUIServer"
tell (1st menu bar item of menu bar 1 whose description is "text input") to {click, click (menu 1's menu item layoutName)}
end tell
end changeKeyboardLayout
And then
changeKeyboardLayout("English")
changeKeyboardLayout("German")
...
Taken from here: http://superuser.com/questions/224161/switch-to-specific-input -source

Answer 2

I use pqrs.org/macosx/keyremap4macbook/
Works with Birman keymaps, including.