Yes, I do. Mojave 10.14.2.
I'm using MAMP 7.1.26-0 and WordPress module 5.0.3-2. I'm using command
sh installbuilder.sh --wordpress_instance_name mydomain
I enabled display of hidden files and after uninstallation, uninstaller remove ALL FILES AND FOLDERS and there is nothing what I have to clean (mydomain folder is completely removed by uninstaller).
I removed two additional themes and all plugins and after that I did uninstall.
Here it is (all other websites are available, so database working just fine):
Error establishing a database connection
This either means that the username and password information in your wp-config.php file is incorrect or we can’t contact the database server at localhost:3306. This could mean your host’s database server is down.
Are you sure you have the correct username and password?
Are you sure that you have typed the correct hostname?
Are you sure that the database server is running?
If you’re unsure what these terms mean you should probably contact your host. If you still need help you can always visit the WordPress Support Forums.