Those enrolled in the Mac or iOS developer programs are given a code to download OS X Server for free. Released: September 16, 2015. Version 5.0.3 of OS X Server operates with either OS X Yosemite 10.10.5 and OS X El Capitan 10.11. Released: March 21, 2016. OS X Server 5.1 requires 10.11.4 El Capitan, and previous versions of OS X Server won't work on 10.11.4 El Capitan. Released: September 20, 2016. Version 5.2 of macOS Server operates with either OS X El Capitan 10.11 or macOS Sierra 10.12. Released: March 17, 2017. Version 5.3 of macOS Server only operates on macOS Sierra (10.12.4) and later. For macOS Server 5.3.1:  Released: September 25, 2017. Version 5.4 of macOS Server only operates on macOS High Sierra (10.13) and later. Released: January 23, 2018. Version 5.5 of macOS Server only operates on macOS High Sierra (10.13.3) and later. Released: April 24, 2018. Version 5.6 of macOS Server only operates on macOS High Sierra (10.13.5) and later. Released: September 28, 2018. Version 5.7 of macOS Server only operates on macOS Mojave (10.14) and later. With this version Apple stopped bundling open source services such as Calendar Server, Contacts Server, the Mail Server, DNS, DHCP, VPN Server, and Websites with macOS Server. Included services are now limited to Profile Manager, Open Directory and Xsan. Released: March 25, 2019. Version 5.8 of macOS Server only operates on macOS Mojave (10.14.4) and later. Profile Manager supports new restrictions, payloads, and commands. Released: October 8, 2019. Version 5.9 of macOS Server only operates on macOS Catalina (10.15) and later. Released: April 1, 2020. Version 5.10 of macOS Server only operates on macOS Catalina (10.15) and later. File and print services  Directory services and authentication  Mail services  Calendaring  Web hosting Collaboration services  Application servers  Media streaming  Client management  Networking and VPN Distributed computing  High-availability features  File systems  Management features  macOS Server is available in English, Japanese, French, German, Simplified Chinese, Dutch, Italian, Korean, Spanish, and Traditional Chinese.