[MacPorts] #63217: (gpredict:17718): Gtk-WARNING **: 12:26:26.523: cannot open display: :0

[MacPorts]

#63217: (gpredict:17718): Gtk-WARNING **: 12:26:26.523: cannot open display: :0
------------------------+--------------------
  Reporter:  WHNiii385  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.7.1
Resolution:             |   Keywords:
      Port:             |
------------------------+--------------------

Comment (by ryandesign):

 DISPLAY should not be :0. Perhaps you are running macOS 11 or later and
 had installed MacPorts 2.6.4? The MacPorts 2.6.4 installer contained a bug
 that erroneously sets DISPLAY to :0 in your shell startup file on macOS 11
 and later. The MacPorts 2.7.0 and later installers no longer have this bug
 but they do not fix the problem in your shell startup file if the MacPorts
 2.6.4 installer had been used before. So please edit your shell startup
 file to remove any line that sets DISPLAY.

-- 
Ticket URL: <https://trac.macports.org/ticket/63217#comment:1>
MacPorts <https://www.macports.org/>
Ports system for macOS