Download Delta0 zip file:
Download (Mac)
If you get this message, click on the "caret"

Click on "keep"

Click on "Show in Finder" and copy on your desktop (optional)

Click on the package "Delta0Mac.zip" to extract

Click on "Delta0" to run. If you get this message, click on "Cancel"

Press and hold "Control/Ctrl" on your keyboard and click on "Delta0".

Click on "Open".
Optional, you can "Move to Trash" the Delta0Mac.zip file