As I seem to have looked for this a bunch of times online and still don’t find the right place for it I’ll leave it written here.
- Get the new version from here phpmyadmin.net
- Go to MAMP in finder
- Rename PhpMyAdmin to PhpMyAdmin-old
- Move new PhpMyAdmin in to place and remove trailing details
I don’t use MAMP Pro so I’m not sure about that