When opening Final Cut Pro 10.4.7, Motion 5.4.4, or iMovie for macOS 10.1.3, menus may appear distorted and fragmented. They might also be transparent, or colored magenta, pale-green, or other unexpected colors. This can also affect other app or Finder menus.
To correct this, update your app. Choose Apple menu > App Store, then click Updates. Next to the app you need to update, click Update to download and install it.