carolquper wrote:
Thanks for the suggestion - I had found that article but just doesn't apply to Catalina unfortunately.
Actually, it does; however, it was a bit more indirect than I thought and I should have given you the direct link instead. Sorry!
In that article, it had a link "sold between 2016 and 2020" which would take you to a How-To Geek page that pretty much offered you the same solution as jefferythefrog gave you. It was in the "How to Disable the Mac Startup Chime" section. I just thought you may benefit from a screen shot of the command.