Of interest to Mac PyFerret users ...
1) Choose a name for the environment (in quotes), and a python version (see NOTE below)
> conda create --name="pyferret75" python=2.7
2) Activate the named environment
> conda activate pyferret75
... various checking info...
failed
UnsatisfiableError: The following specifications were found to be incompatible with the existing python installation in your environment:
Specifications:
- pyferret==7.5.0 -> python[version='>=2.7,<2.8.0a0|>=3.6,<3.7.0a0|>=3.7,<3.8.0a0|>=3.8,<3.9.0a0']
Your python: python=3.9
---------------
These specifications say that PF7.5 will run using: