Hi Francisco! Thanks for sharing your problems here. I don't know exactly why your problem appears... But I'm going to suggest two things to try:

1. Try providing a specific version when installing: pipenv install tensorflow-macos==2.7.0

2. Try using pip instead of pipenv (this shouldn't be the problem but who knows?): pip install tensorflow-macos

Please let me know if it works and, if so, which of both approaches, and I'll update my post accordingly.

Thanks!