Artur, the current snapshot for macOS is gretl 2020e-git, dated
2020-11-17 (check under /Help/About gretl). You can find it at

http://sourceforge.net/projects/gretl/files/snapshots/gretl-quartz.pkg/download
or
http://ricardo.ecn.wfu.edu/pub/gretl/gretl-quartz.pkg

Thank you Sven! 

Got it! Tested!  And it works fine now!

Best,

Artur