Click on “ Cancel” and do not click on “ Move to Thrash.”.This happens because Mac OS does not want you to install third-party apps downloaded outside of iTunes. A prompt will tell you that Kodi is damaged, do not believe it.
You may also use the “ Search” service on the top-right corner of the window if you have too many apps installed that makes it hard for you to find Kodi. Click or drag on the Kodi icon to the Application folder and drop it in to start the unpacking of the software.