How to fix that app can't open on macOS Catalina?

After upgrading to macOS Catalina, some mac users feedback that MusicPlus "can't be opened because Apple cannot check it for malicious software". A dialog box pops up, click "OK" button and the application will close.

Solution

  1. Download install file (zip): https://dl.musicplus.io/MusicPlus.app.zip

  2. Extract then copy .app file to /Applications in Finder,

  3. Right click the app icon -> choose Open

Open MusicPlus on MacOS Catalina

  1. click Open button in the pop-up window

Open MusicPlus on MacOS Catalina