Downloading

1. Downloading Super Productivity

   Download Super Productivity Archive for Mac OS

   Downloading Super Productivity .dmg

   Get Super Productivity.

2. Mounting Super Productivity Archive

   Then to Mount Super Productivity Archive on Mac Catalina
   From Chrome Browser Simply Choose Super Productivity from the Bottom Bar:

   

   Get Google Chrome Browser.
   Instead with Safari use the Dock and just Select the Super Productivity Dmg to Mount it:

   

   Or else Open a Finder Window:

   

   And Double-Click on the .dmg Archive: