Allow Finale to use your microphone. You may have to open System Preferences/Security to allow this.

Before Mojave, Finale would not have asked. Apps that export audio need an input source. 

Here's the Apple Support link:

https://support.apple.com/guide/mac-help/control-access-to-your-microphone-on-mac-mchla1b1e1fe/mac#:~:text=You%20can%20decide%20which%20apps,%26%20Privacy%2C%20then%20click%20Privacy.&text=Select%20Microphone.,it%20to%20access%20the%20microphone. 

When I updated to 26.3 this morning, Finale asked to access the microphone. This surprised me but I granted permission as usual. This time, I didn't have to go the Security to let it happen.

No difference between Mojave on my iMac Pro and Catalina on my MacBook Pro.

Glad you mentioned your version, Mike. I did not get an e-mail about this. I guess that's the downside of being at the end of the alphabet.

Fortunately my version of Finale found the Update when asked. Now I'm set.

I saw the update in Scoring Notes. Then, when I opened 26, it prompted me.

I heard about it on the other forum.  No email to me, either.