I'm attempting to get a working version of python3 installed on a mac running Catalina (10.15.7). Calling python3 from the terminal ultimately errors with a software not available message. I've seen this problem already noted on this forum. Installing Homebrew installs CLT as well, and a python3 version in /usr/local/bin (version 3.9). I can then install numpy with pip3, but I cannot install scipy, which kicks up about 800 lines of error starting with openblas issues. Has anyone successfully installed scipy with Catalina? If so, how?