It can be helpful to run a local version of your website on your own Mac. There is an application called MAMP designed for setting up a ‘localhost’ on your local computer. Details for how to do this can be found at https://www.wpbeginner.com/wp-tutorials/how-to-install-wordpress-locally-on-mac-using-mamp/. Another more detailed set of instructions is available at https://skillcrush.com/blog/install-wordpress-mac/
NOTE: Folks who have upgraded to Catalina if they set the MAMP ports to anything other than the default. Details https://apple.stackexchange.com/questions/372076/macos-catalina-doesnt-allow-mamp-permission-to-certain-folders-documents-down
Download the latest WordPress and the follow these instructions. When you create your database in MAMP’s phpMyAdmin, note that the database user name and password is root in both cases.