These licenses are for new PSQL v13 Server engine purchases for Windows or Linux platform(s). If you are looking PSQL v13 to work with OS X platform, please revert to our price for OS X platform. PSQL v13 is Officially supporting to operating systems include Windows 10, Windows 8.1, Windows 8.0 (and newer), and Windows Server 2016, Windows Server 2012, or Windows Server 2008 R2 (and newer). Older operating systems (including Windows XP and Vista) have not been tested and may not be supported.