Dear Therion mailing list, I wonder if anyone has had any success building, installing and running Therion on Mac OS X Catalina (OS 10.15.2)? I have successfully built and installed Therion 5.4.4, and Therion and Loch both run fine. Before the upgrade, everything worked OK, but it looks like some things have moved around in this version of OS X, amongst other things breaking. When I try to run Xtherion, Tcl/Tk can't seem to locate BWidget, and the GUI can't run: Error in startup script: can't find package BWidget while executing "package require BWidget" (file "/usr/local/bin/xtherion" line 12268) I have tried unpacking the bwidget 1.9.14 scripts to /usr/local/lib thinking that tcl would check there, and then also tried to set auto_path to force tcl to look in there, but it won't seem to start up. There's a pause, and Wish seems to start up, and yet XQuartz actually opens; I have tcl 8.6 installed and can run the tclsh OK. It's been frustrating me for a while, and I saw this lockdown in the UK as an opportunity to have another look at this. Any pointers or tips would be most welcome. Regards, David Eason