This guide will walk you through downloading Keyrails, installing it on your Mac, giving it the necessary permissions, and setting up your preferred shortcut.
Open the Keyrails download page and click Download.
Then:
Once the installer opens, drag the Keyrails app into your Applications folder.
Then:
Keyrails will now walk you through the permissions it needs to work correctly.
The first permission Keyrails needs is Screen Recording.
When prompted: