MacOS – Firefox Developer Edition [and others] not opening in macOS Catalina

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Ok… tell me it's not just me, when I launch Firefox Developer Edition [68.0b13] in macOS Catalina [beta 2] I get the error message that it can't open because it's from an unidentified developer.

So, I try to go to the file in Application and right-click open and confirm that I want to open. The base program opens but there is an updater sequence that Firefox tries to open that hits the same wall as before.

I've even gone to Security and Privacy and told it to open anyway. Still nothing.

Does anyone know how to overcome this and get FDE to launch or am I just screwed until Apple and Mozilla figure their stuff out?

Best Answer

Ok... I figured it out.

Disable the block

sudo spctl --master-disable

Launch Firefox and allow the update to complete then re-enable the block. I bet this will also resolve other software not opening as well.

sudo spctl --master-enable

Thanks to @Mark for the reminder about the Beta forums.

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