On Jan 28, 2022, at 15:34, Dave Horsfall wrote: > > mackie:~ dave$ echo $DISPLAY > > mackie:~ dave$ > > Is this something I forgot to do during the upgrade? I set $DISPLAY to > ":0" (an old Unix trick) to no effect,
Setting DISPLAY to :0 is correct on Mac OS X 10.4.x and earlier, but is incorrect on Mac OS X 10.5 and later and will cause problems. On 10.5 and later, the X server (either the xorg-server port or the standalone XQuartz package) will set DISPLAY to the correct value for you when it has been properly installed and set up.
