Xcircuit not starting in macos Catalina (version 10.15.7)

[avlsi]

Hi,
I have installed Xcircuit via macports

sudo port install xcircuit
And then tried to open Xcircuit via
xcircuit
I get the following error

---

application-specific initialization failed: couldn't connect to display "0:0"
Error in startup script: couldn't connect to display "0:0"
while executing
"load /opt/local/lib/libtk8.6.dylib Tk"
("package ifneeded Tk 8.6.11" script)
invoked from within
"package require Tk $tcl_version"
invoked from within
"if {$tcl_version < 8.0} {
return -code error "tkcon requires at least Tcl/Tk8"
} else {
package require Tk $tcl_version
}"
(file "/opt/local/lib/xcircuit-3.9/tkcon.tcl" line 44)

[1] + exit 1 xcircuit

Any help is appreciated?

[RTimothyEdwards]

You can check the instructions in https://github.com/RTimothyEdwards/netgen/blob/master/README.md for Mac OS, since the build is mostly the same, and depends on Tcl/Tk. But generally speaking, the "couldn't connect to display 0.0" message means that there is not an X11 server running, which probably just means that you need to be running Xquartz.

[avlsi]

Thanks for the Xquartz insight. I am able to open xcircuit after installing Xquartz.