Well, with a new installation of Catalina on the same machine everything is working perfectly. On the new system also both package management systems (brew/port) are now installed. It is not caused by them. Also Command Line Tools an Xcode are installed. And everything works.
But what is it that causes this error on my other system? I’ve posted a lldb backtrace of my old system here: https://gitlab.com/marnen/lilypond-mac-builder/-/issues/16#note_317315811 Best, Moritz > Am 03.04.2020 um 09:34 schrieb Moritz Heffter <mxo...@me.com>: > > >> Am 02.04.2020 um 23:33 schrieb Hans Åberg <haber...@telia.com>: >> >> >>> On 2 Apr 2020, at 19:49, Carl Sorensen <c_soren...@byu.edu> wrote: >>> >>> I don’t think it’s a general issue. I think it’s a specific issue, that >>> varies from machine to machine. >> >> A way to see if it is a problem with the installation is to make a second >> volume on the computer and install a new MacOS 10.15 on that, reboot into >> it, and try the LilyPond MacPorts installer on that. > > Ok, I’ll try that later today and send you the results. > > Best, > Moritz