macOS build on conda-forge has issues

[davewhipp]

The conda-forge build is not live and seems to be working fine in Linux, but not in macOS. The macOS build has two issues:

• The RDAAM_He executable reports ZHe ages of 0.0
• The ketch_aft executable aborts after calculating the age, which prevents the Python codes from working properly

I've seen these issues earlier and managed to avoid them locally, so it may just be a configuration problem with CMake.