
MacPorts version 2.6.4 is available in various formats for download and installation (note, if you are upgrading to a new major release of macOS, see the migration info page):


Apple's X11.app is provided by the “X11 User” package on older OS versions. The XQuartz Project provides a complete X11 release for macOS including server and client libraries and applications. XQuartz 2.8.1 - XQuartz 2.8.0 - First release with native Apple Silicon support XQuartz 2.7.11 - Last release to support Snow Leopard, Lion, and Mountain Lion.
