How Can I Make Python 3 the Default Python Version on macOS?

Setting Python 3.x as the Default on macOS

To set Python 3.x as the default on macOS, you can create an alias in your shell.

Steps:

1. Open your command shell (Terminal, iTerm2, etc.).
2. Add the following line to your .profile file, which is located in your home directory (~/.profile):

alias python='python3'

3. Source your .profile file in your shell:

• For bash (macOS 10.14 and below):

  [ -e ~/.profile ] && . ~/.profile

• For zsh (macOS 10.15 and later):

  [ -e ~/.profile ] && . ~/.profile

Note: Changing the default Python executable system-wide may break applications that depend on Python 2. To avoid this, you can create an alias instead of modifying the default executable.

Additional Tips:

• To invoke the original Python 2 interpreter, use the python2 command.
• For scripts, use #!/usr/bin/env python3 as the shebang line to explicitly use Python 3 instead of the default system interpreter.

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