make install_sct osx proof
make install_sct osx proof


Former-commit-id: 474fd084339032b0f603f2c829f9a9d9acb202d5
Former-commit-id: 5d802d5802cb53348bc83e605cefabb3caf99ccc
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox