Okay! I have sorted out that I needed to package the source python file of the previous Mac app into an xcode project and everything is running merrily. Since FFmpeg is an open-source company under license GNU Lesser General Public License version 2.1, I believe it is okay to continue relying on their software. I am now at the point where my code project / app consists of a python file and a static build of ffmpeg. The only runtime error I ran into was the error ""ffmpeg" Cannot be opened because the identity of the developer cannot be confirmed." This error was easily fixed by opening the ffmpeg build file from Finder so that the software was saved as an exception in security settings. My question for continuation since the python xcode project app is built, running and functional now after permitting ffmpeg with my security settings: Will signing this app and moving forward to the notarization step remove the error from the ffmpeg build?