Does MAMP PRO 5 run on Mac OS Catalina beta? MAMP GmbH June 05, 2019 13:13 Follow At this time we cannot guarantee MAMP PRO will work issue free with Mac OS Catalina beta. Related articles Läuft MAMP PRO 5 auf Mac OS Catalina beta? Why does MAMP PRO need access to my keychain? When I enter my MAMP PRO url in a browser on a different device my webpage does not show up. My https site shows a warning when I try to open it. Do you have a student discount?