This is definitely NOT a feature. You only need the KM Editor running when you need to view/edit macros.
In order to trigger a macro, you need:
- The Keyboard Maestro Engine to be running (in the background)
- Both the Macro and its Macro Group must be enabled.
- Normally done manually by the user, or using an Action in another macro.
- Both the Macro and its Macro Group must be active.
- Usually determined by the KM Engine, but can also be set by Action in another macro
- See Macro Activation
A few KM 8.0+ users who are running macOS High Sierra are experiencing issues where the KM Engine stops/crashes. For more info see: