Osx Python3


Apple’s Mac OS comes with python 2.7 installed by default. Perhaps you may want to use python 3.x.x on your machine and also use pip for package management with python 3.x.x. The easiest way to achieve this is by:

  1. Osx Python Ide
  2. Osx Python 3 Software
  3. Osx Python3 Default

Python 3.9.4 pyenv 1.2.27 pipenv 2020.11.15 pip 21.1.1 (this is latest at the time I'm writing) scipy 1.6.3 (not pinned, resolved by pipenv) Trying to pipenv install scipy as a dependency for pipenv install lightgbm. Only the export SYSTEMVERSIONCOMPAT=1 solution worked for me. Without this envvar, pipenv was falling back to building from.

  1. Quit Python and all related processes. Launch MacFly Pro, then select Apps. Select Python Launcher.app, IDLE.app, Build Applet.app from the list. Click Uninstall Selected. All apps and related data will be removed. Open Finder Applications and move the Python 3.X (your Python version) folder to Trash.
  2. Python 2.x is the legacy version, and Python 3.x is the present and future of Python, but some of the less disruptive improvements in 3.0 and 3.1 have been backported to 2.6 and 2.7, respectively. Regarding the materials available to learn about Data Science and Machine Learning you need the ability to switch between those Python versions,.

NOTE: This tutorial does not useVirtual Environments like virtualenv or pyenv to manage various python versions

1. Installing python3

  • Follow this link and download the latest python3OS X package
  • Run the package and follow the steps to install python3 on your computer.
  • Once the installation is done, on your Terminal, run

This will print out the version of python installed on your system. The output should be similar to:

You may verify the installation directory of python by runningthe following line on the Terminal.

The prompt should print the install path for python3. An example output is:

2. Install pip3:

  • Securely download the get-pip.py file from this link
  • From the directory where the file was downloaded to, run the following command in the Terminal
  • Once the installation completes you should see the prompt print message similar to this
  • Verify the installation of pip3 by running the following on the Terminal

This should return the install location of pip3.

  • To install python3 packages using pip3, run

Remember to replace packageName with the appropriate package name for your case.

Happy Pythoning!

Osx Python Ide

As with just about any open source software package, there are quite a few ways to install Python on Mac OSX. I figured it would be helpful to detail a few of the easiest ways to install Python, including the following:


These are the most commons you'll encounter, and each method has its own purpose, all of which I'll detail in the sections below.

Instructions for installing Python 2 and 3 are different in most cases (but not by much), so make sure you're paying attention to which version you need installed.

Now, keep in mind that Mac OSX (10.8) already comes with Python 2.7 pre-installed, so these instructions will only really be helpful if you need to upgrade versions or need a better way to manage installations (like with Homebrew).

Osx Python3

Install Python with Homebrew

First of all, if you don't know what Homebrew is and you use Mac OSX, you should. According to their website, Homebrew is 'the missing package manager for OS X'. I'd say this is pretty accurate.

Homebrew lets you install, update, and uninstall packages from the command line, just like apt-get does for Ubuntu. It makes it much easier to install all the various tools you might need. For example, here are just a few things I've installed with it: android-sdk, go, mongodb, sqlite, git, imagemagick, lua, python3.

To install Homebrew, just follow the instructions on their website (which I linked to at the beginning of this section).

Now that you know what Homebrew is and have it installed, we can get on to installing Python. You can install a few different versions of Python, including 2.7.x and 3.5.x.

To install Python 2.7.x, just type:

If you'd rather have Python 3, just replace python with python3. To see all the versions available, search Homebrew with this:

This will show you a list of Python-related packages that can be installed.

Install Python Binaries

Osx Python 3 Software

If you want to upgrade to the latest 2.7.x version or upgrade to Python 3, you can get a binary directly from the Python website.

To install, just click the link above, then click on the version you want. The latest version 2 and 3 links are at the top. Once you've clicked on the version you want, you should see a list of downloads for different operating systems and package types (like source code tarballs, installers, etc).

Osx Python3 Default

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Osx python install

I'd recommend using the installer since it'll handle everything for you. Just make sure you download the installer that matches your CPU architecture type (32 or 64-bit). In my case I'd be downloading Mac OS X 64-bit/32-bit installer.

Once you've opened the installer, follow the instructions and Python will be installed for you.

Install Python from Source

The last, and most uncommon, method is to install Python from its source code. Most people don't do this since the binaries are alreay built for them. This is really only ever preferred when you want to really customize the binary by setting certain options/flags during the build process.

Here are the commands to download, unpack, and install Python from source:


Just make sure you change the version numbers to whichever version you want to install.

Note that the same exact commands can be used for Python 3 source compiling, as long as you replace the approprate version numbers.