Developer cannot be verified on MacOS - GoldenCheetah/GoldenCheetah GitHub Wiki

MacOS will block applications that have not been signed by a verified developer. To do this we have to pay Apple money. We do not like paying Apple money to allow users to run our program, so we don't give them a bean.

Instead, when you run GoldenCheetah for the first time you need to press Control and right-click on the GoldenCheetah icon in the Applications folder. Choose the Open option and then a dialog will be presented warning you the developer is unverified. From here you should go ahead and click Open to run the application. You will only need to do this the first time you run, the setting is remembered until you install a newer version.