Hi Alberto

I can see in the image the following issue:  `Dynamic session lookup supported but failed ...`

Can you try to run the following commands?

 sudo launchctl load -w /Library/LaunchDaemons/org.freedesktop.dbus-system.plist
 launchctl load -w /Library/LaunchAgents/org.freedesktop.dbus-session.plist

as suggested here https://trac.macports.org/ticket/53378

>1) I can launch EStudio ONLY from the MacOS Terminal window using 'ec -gui' command and this starts the EStudio window ...

What happens if you run from the terminal window `estudio`?
Did you add the environment variables to your .bash_profile file? 

>2) ...
Check https://www.lifewire.com/add-files-folder-and-apps-to-finder-toolbar-2260869