If running into compiler issues on Mac try:
-
clean anaconda un-install: https://docs.anaconda.com/anaconda/install/uninstall/
-
sort the xcode developer issues described here https://discourse.mc-stan.org/t/compiling-error-after-upgrading-to-macos-big-sur/19309/3 by:
sudo rm -rf /Library/Developer/CommandLineTools
xcode-select --install
- re-install Anconda: https://docs.anaconda.com/anaconda/install/mac-os/