Hyper Key

BetterTouchTool (starting with version 3.540) allows you to use Caps Lock as a Hyper Key. A Hyper Key is a magical key which automatically presses all the standard modifiers (ctrl+shift+cmd+opt).

Why would you need that? Because on macOS many of the easy to reach shortcut combinations are already used by the system or by some app. By using the Hyper Key can can define shortcuts in BTT that are pretty much guaranteed to not be used anywhere else (who would want to press e.g. ctrl+shift+cmd+opt+ P). This makes room for tons of easy to remember and easy to use shortcuts.

NOTE: The Hyperkey in BTT is only designed to work well with shortcuts defined IN BetterTouchTool.

1 Configuring the Hyper Key

Go to the Keyboard Shortcuts section in BTT and add a new shortcut. Record the Caps Lock Key. If it doesn't record for some reason make sure you have set Caps Lock to Caps Lock in System Preferences => Keyboard => Modifiers for the keyboard you are using.

After doing that assign a new action to the Caps Lock key - select Act as Hyper Key from the list.

Now the basic setup is done and you can start to use your Hyper Key.

2 Advanced Hyper Key Configuration

In some situations it might be helfpul to not only use the Hyper Key as a fancy modifier key but also trigger some other functionality when it is not being used as part of a shortcut.

For example you might want to retain the ability to trigger the real Caps Lock functionality or your might want to use it as an ESC key.

This can be achieved by using the action Category "Actions Executed On (Unused) Hyper Key Release":

In this example it executes the esc key when released without triggering another shortcut.