The Mac JamKazam app was updated today. It's Build 1.20 - "1.0.3674". To see the app version, select the JamKazam --> About JamKazam menu item. 

(From the official post here):

May 6th, 2020
Windows & Mac Client Updated

1. Live stream fixes
   
   
2. Find Session screen overhauled. Easier to find friend and join up with friends now.