How to Download Python 3.6 on Mac Updated
How to Download Python 3.6 on Mac
MacOS comes with Python pre-installed. But information technology'due south Python Version two.7, which is now deprecated (abased by the Python developer customs).
The unabridged Python community has now moved on to using Python three.x (the current version as of writing this is three.9). And Python 4.10 will be out before long, but it will exist completely backward compatible.
If yous endeavor to run Python from your MacOS last, you'll even meet this warning:
Until Apple decides to set Python 3.x, as the default you're going to have to install it yourself.
A Single Command to Run Python three
For some of yous reading this, this command may be enough. You can run Python 3 using this control (with the 3 at the end).
python3 If that's all you came for, no worries. Accept a fun day and happy coding.
But if you lot want a proper Python version control system to keep track of diverse versions – and have fine-grain command over which version you use – this tutorial will bear witness you exactly how to attain this.
How to Install Homebrew on Mac
First you need to install Homebrew, a powerful parcel director for Mac.
Open up your last. You can do this past using MacOS spotlight (command+infinite) and typing "concluding".
Now that you're in a command line, you can install the latest version of Homebrew past running this command:
/bin/fustigate -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/Head/install.sh)" Your terminal volition ask for Super User-level access. Yous will need to type your countersign to run this command. This is the aforementioned password you lot type when yous log into your Mac. Type information technology and hit enter.
Homebrew will ask you lot to confirm you want to install the following. Yous have to press enter to proceed. (Or press any other key if you go cold anxiety.)
How to Install pyenv to Manage Your Python Versions
Now permit'due south take a moment to install PyEnv. This library volition assistance you switch betwixt dissimilar versions of Python (in example you need to run Python ii.10 for some reason, and in anticipation of Python 4.0 coming).
Run this command:
mash install pyenv 
Now you can install the latest version of Python.
How to Use pyenv to Install Python or Update Your Python Version
Now y'all but need to run the post-obit command:
pyenv install 3.nine.2 Annotation that you can substitute 3.ix.2 for whatever the latest version of Python is. For example, once Python iv.0.0 comes out, y'all tin run this:
pyenv install 4.0.0 Troubleshooting pyenv Installation
If you lot encounter an error that "C compiler cannot create executables" then the simplest way to solve this is to reinstall Apple'due south Xcode.
Xcode is a tool created by Apple that includes all the C libraries and other tools that Python uses when it runs on MacOS. Xcode is a whopping eleven gigabytes, but y'all'll desire to be up-to-date. You may desire to run this while you lot're sleeping.
You tin can get the latest version of Apple'southward Xcode here. I had to do this after upgrading to MacOS Big Sur, but one time I did, all the following commands worked fine. Merely re-run the higher up pyenv install 3.9.ii and information technology should now work.
How to Set up Upward Your MacOS PATH for pyenv (Bash or ZSH)
Start y'all need to update your Unix path to pave a way for PyEnv to be able to interact with your system.
This is a long explanation of how PATH works in MacOS (and Unix), straight from the pyenv GitHub repo.
When you run a control likepythonorpip, your operating system searches through a list of directories to find an executable file with that name. This list of directories lives in an environment variable calledPATH, with each directory in the list separated past a colon:
/usr/local/bin:/usr/bin:/bin Directories inPATHare searched from left to correct, and so a matching executable in a directory at the beginning of the list takes precedence over some other one at the end. In this case, the/usr/local/bindirectory will be searched get-go, so/usr/bin, and so/bin.
And here is their explanation of what a Shim is. I'grand quoting them at length again considering I actually can't explain this improve myself.
pyenv works by inserting a directory of shims at the forepart of your PATH: $(pyenv root)/shims:/usr/local/bin:/usr/bin:/bin Through a process chosen rehashing, pyenv maintains shims in that directory to match every Python command across every installed version of Python—python,pip, and then on.
Shims are lightweight executables that simply pass your command along to pyenv.
Hither'due south how to update your .bash_profile in Bash (which is installed in MacOS past default):
echo 'consign PYENV_ROOT="$HOME/.pyenv"' >> ~/.bash_profile echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bash_profile Or if you've installed ZSH (or OhMyZSH) like I have, yous'll desire to edit the .zshrc file instead:
repeat 'export PYENV_ROOT="$Dwelling/.pyenv"' >> ~/.zshrc echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.zshrc Then y'all desire to add PyEnv Init to your terminal. Run this command if you're using Fustigate (again, this is the default with MacOS):
repeat -eastward 'if command -v pyenv one>/dev/cipher ii>&i; then\n eval "$(pyenv init -)"\nfi' >> ~/.bash_profile Or run this command if you're using ZSH:
echo -e 'if command -v pyenv one>/dev/nothing 2>&1; then\north eval "$(pyenv init --path)"\n eval "$(pyenv init -)"\nfi' >> ~/.zshrc Now reset your terminal by running this command:
reset How to Prepare a Version of Python to Global Default (Bash or ZSH)
You lot can fix the latest version of Python to be global, pregnant it will exist the default version of Python MacOS uses when you run Python applications.
Run this command:
pyenv global 3.9.two Again, you can supercede iii.9.2 with whatever the latest version is.
Now you can verify that this worked by checking the global version of Python:
pyenv versions You should see this output:
The Concluding Step: Shut Your Terminal and Restart it
Once you've restarted your terminal, you lot run the python command and yous'll launch the new version of Python instead of the old one.
Congratulations. Thank you for reading this, and happy coding.
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How to Download Python 3.6 on Mac
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