Platform: macOS Server · Sierra 10.12
Release date and requirement recorded by Apple; selected milestones.
Apple source ↗Apple's documentation dates macOS Server 5.2 to September 20, 2016, for macOS Sierra 10.12. Version 5.2 belongs to the server application, not an operating system called macOS 5.2. This entry groups the verified Sierra-period 5.2 and 5.3 milestones.

Writing in MacRumors that September 20, Mitchel Broussard reported Profile Manager integration with Apple School Manager, options to skip setup panes and restrictions such as preventing Mac unlocking with Apple Watch. His report also listed Caching Server replication controls and a US $19.99 purchase price. This is attributed historical reporting, not a current offer.
Mitchel Broussard · MacRumors · 2016-09-20
Apple's original 5.2 security note records an Apache change that stops setting HTTP_PROXY from CGI and removal of RC4 as a supported cipher in ServerDocs Server. These are specific documented fixes; they do not establish that the product became free of vulnerabilities.
Apple dates Server 5.3 to March 27, 2017, requiring macOS 10.12.4 or later. It documents denial-of-service fixes in Profile Manager and Web Server and improved permissions checks in Wiki Server. This update's requirement stays separate rather than being projected back onto 5.2.
Selected releases, not a complete history. Dates follow Apple's release records, not the latest page edit. No builds are included.
ISO date: year-month-day.
Platform: macOS Server · Sierra 10.12
Release date and requirement recorded by Apple; selected milestones.
Apple source ↗Platform: macOS Server · Sierra 10.12.4+
Release date and requirement recorded by Apple; selected milestones.
Apple source ↗