Installation
The current method of installion requires downloading mSpelling and allowing your computer to open it (MacOS).
To install mspelling:
Download the most recent version of mspelling from the release page
Open the app by double clicking on it
You will probably receive a message that the app cannot be verified and that you should not open it. That is OK, is just Apple being very cautious.
To enable the app:
Go to System Settings > Privacy & Security > Security
Press Open Anyway
That is it! You can now open the app again.