Step-by-step Python 3.6.x installation process on Apple Macbook M1 with Mac OS X Big Sur

Python36-on-macbook-m1.sh

# 0. [OPTIONAL] In case: `Error: Failed to link all completions, docs and manpages: Permission denied @ rb_file_s_symlink`
sudo chown -R $(whoami) /usr/local/share/zsh


# 1. Install x86_64 Homebrew version:
arch -x86_64 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"


# 2. In case `brew --prefix` is not `/usr/local` run this (for zsh) and restart the terminal:
echo 'export PATH="/usr/local/bin/:/usr/local/sbin:$PATH"' >> ~/.zshrc


# 3. Install `pyenv`, `bzip`, `zlib`, `xz`:
arch -x86_64 brew install pyenv bzip2 zlib xz


# 4. [OPTIONAL] In case: `zipimport.ZipImportError: can't decompress data; zlib not available`
arch -x86_64 brew uninstall zlib && arch -x86_64 brew install zlib


# 5. Restart the terminal app or the Mac itself in case `echo $(brew --prefix zlib)` does not return `/usr/local/opt/zlib`


# 6. Here go dragons:
CFLAGS="-I$(brew --prefix openssl)/include -I$(brew --prefix bzip2)/include -I$(brew --prefix readline)/include -I$(xcrun --show-sdk-path)/usr/include" \
LDFLAGS="-L$(brew --prefix openssl)/lib -L$(brew --prefix readline)/lib -L$(brew --prefix zlib)/lib -L$(brew --prefix bzip2)/lib" \
arch -x86_64 pyenv install --patch 3.6.12 < <(curl -sSL https://github.com/python/cpython/commit/8ea6353.patch\?full_index\=1)

Note if brew is not in /usr/local this will cause installation failures on step 2

Note if brew is not in /usr/local this will cause installation failures on step 2

Thanks! added step for that