Description:

A couple of days ago some CI checks that run on macos-latest with older versions of Python (3.7, 3.8, 3.9) started failing.

Action version:

actions/setup-python@v4

Platform:

• Ubuntu
• macOS
• Windows

Runner type:

• Hosted
• Self-hosted

Tools version:

- name: Install Python
  uses: actions/setup-python@v4
  with:
    python-version: '3.7'
    architecture: 'x64'

Repro steps:

Here is a public example: https://github.com/jupyter/notebook/runs/7973591481

There is also this issue with screenshots comparing macos to linux: jupyterlab/jupyterlab#12991

Expected behavior:

pip should correspond to the Python setup with actions/setup-python (in the example above), when invoked with python -m pip or python3 -m pip.

Actual behavior:

In https://github.com/jupyter/notebook/runs/7973591481 we notice a Python version mismatch:

Thanks for your help!