"Submit a brief application for an opportunity to join the program. Selected developers will receive a link to order the Universal App Quick Start Program from the online Apple Store. Priority will be given to applicants with an existing macOS application, as availability is limited."
https://developer.apple.com/programs/universal/
"Submit a brief application for an opportunity to join the program. Selected developers will receive a link to order the Universal App Quick Start Program from the online Apple Store. Priority will be given to applicants with an existing macOS application, as availability is limited."