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 When I enter my MAMP PRO url in a browser on a different device my webpage does not show up. Why does MAMP PRO need access to my keychain? My https site shows a warning when I try to open it. How many devices can I sync with my timeEdition database? Do you have a student discount?