Musescore 3 incompatability with my imac running Apple Mac OS Catalina

I have musescore 2 on my iMac and I was requested to update it. I downloaded musecore 3 on 6/15/20 and tried to load it onto my iMac running the operating system Mac OS Catalina. I was informed that it couldn't be loaded due to incompatability and I should contact you. Please advice and inform me when you will have compatible software. Thanks. Nat