Quicksilver

macOS offers a variety of virtual keyboard layouts which are accessible through System Preferences > Keyboard > Input Sources. Because I spend about half of my time writing in Russian and half in English, rapid switching between keyboard layouts is important. Optionally in the Input Sources preference pane, you can choose to use the Caps lock key to toggle between sources. This almost always works well with the exception of Anki. Presumably Anki’s non-standard text management system thwarts the built-in Caps Lock/toggle mechanism for reasons that are not clear to me. Equally unclear is why this worked previously but now does not. I’ve not updated either Anki or the system software. It’s a mystery. Nonetheless, began to search for an alternative method for switching between keyboard layout switching. What I developed relies on several tools: