macOS Catalina (10.15), Big Sur (11.x) and Monterey (12.x)
The current versions of Connect Fonts require macOS™ 11.x, macOS 12.x and macOS 13.x to run properly. Connect Fonts does not function properly on Catalina (10.15) or older operating systems.
Additional Information:
Please use the following links for current System Requirements
Connect Fonts Desktop Download and Support Page:
https://www.extensis.com/support/connect-fonts
System Requirements:
https://www.extensis.com/support/connect-fonts/system-requirements/?hsLang=en