MacQIIME is QIIME 1.9.1. That's a different (no longer supported) version of the software. You need to use the QIIME-2019.7 (or similar) version of the software for the tutorials to work. I think we talked about that problem earlier:
I agree with, though: naming your environment qiime-2019.7 or something similar can help you manage your environments while.