The MySQL server software itself and the client libraries is available on multiple operation system including macOS. To completely uninstall MySQL OS X it is necessary to remove numerous files and folders and edit one file. So in this article, we’ll show you how to uninstall MySQL from your Mac with minimal effort.
Anyway, to make a long story short, nothing I did to remove the 5.1.3 gracefully worked. I tried using the old.MSI file, tried reinstalling, changing the install configuration, editing registry keys. I also tried using. Nothing worked.The solution was to use tool from Microsoft - called 'Windows Installer CleanUp Utility'. It's supposed to be a wrapper for msizap, but it did the job, while msizap did not.Regardless of MySQL, this is a good tool to be familiar with. It removed 3 other entries in my 'Programs and Features' list that refused to leave by themselves.Update: I've had to solve this problem a few more times since posting.
As it seems, this 'Windows Installer CleanUp Utility' is basically a wrapper for msizap, so it probably used some other parameters that made it work. In addition, I've encountered a time where none of the tools worked, but a registry 'Seek & Destroy' for 'MySQL Connector' did the job.