(Updated August 20, 2021)
Since PyMOL 2.5, our pymol conda packages are based on conda-forge. The following command will install PyMOL on Windows, macOS or Linux into a conda environment:
conda install -c conda-forge -c schrodinger pymol-bundle
On macOS, you need this command in addition:
pip install PyQt5
For PyMOL 2.0 to 2.4, this command should be sufficient:
conda install -c schrodinger pymol