Thanks for the reports. I’m able to replicate the issue - there appears to be an issue fixing up the shared libraries for the VMTK extension on mac.
I guess it needs something like this: COMP: Fix extension packaging on macOS accounting for synthetic firmlink · Slicer/Slicer@858c195 · GitHub
Probably something similar or more extensive is needed for VMTK due to its structure. It would be great if someone has a chance to dig in to this.
For now maybe use older slicer or build from source.