cvmfs: cvmfs mount segmentation fault in macos 1015 github-actions

Since about 1 week ago the github actions running on macos 1015 and mounting CVMFS repositories are failing with

https://github.com/AIDASoft/DD4hep/runs/5724820416?check_suite_focus=true#step:3:155

mount: /Users/Shared/cvmfs/sft.cern.ch: Segmentation fault
mount: /Users/Shared/cvmfs/geant4.cern.ch: Segmentation fault
Error: Process completed with exit code 69.

I tried using older cvmfs releases e.g., https://github.com/AIDASoft/DD4hep/pull/900 as there was a new cvmfs-latest.pkg file on March 23 but that didn’t help.

Between the last successful run and the failures I see this difference in the update version of macos

working: https://github.com/AIDASoft/DD4hep/runs/5631738281?check_suite_focus=true#step:1:3

  Mac OS X
  10.15.7
  19H1713

Failing: https://github.com/AIDASoft/DD4hep/runs/5681443820?check_suite_focus=true#step:1:5

  Mac OS X
  10.15.7
  19H1824

Of course there could be other causes of why this fails, but I don’t have a good way of testing against different macos versions. Here is the diff for the macos used in github actions, maybe something is apparent to you: https://github.com/actions/virtual-environments/commit/5a140881dfe066c0878c62e0e7963c4d5c276f14