I try to use “General Registration Elastix” module extension but it tells me
Volume registration is started in working directory: /Volumes/Slicer-4.10.2-macosx-amd64/Slicer.app/Contents/Extensions-28257/Elastix/20190712_135520_600
Register volumes…
Error: Command ‘elastix’ returned non-zero exit status 254
I don´t know what that error means. I have installed 4.10.2 version for MAC.
You are running Slicer from a read-only working directory, you need to move Slicer to /Users/YourUser/Applications/ . This will solve all your problems