Install Python3 on Mac

Question

Hey, I found this project on github: https://github.com/trailofbits/algo that helps me set up a personal Wireguard and IPSEC VPN. I need to install the dependencies which include Python3. The problem is I am working on MAC and Apple does not provide python3. How do I get python3 in MAC?

Answer 1

There are two ways of installing python3 on a mac system:

• Use the Homebrew package manager. After installing Homebrew install Python 3 by running brew install python3.

• Download and install the latest stable Python 3 package. Be sure to run the included Install Certificates command from Finder.

Once Python 3 is installed on your Mac, from Terminal run:

python3 -m pip install --upgrade virtualenv

Hope this helps!!

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Thanks!

Answer 2

The script will explain what changes it will make and prompt you before the installation begins. Once you’ve installed Homebrew, insert the Homebrew directory at the top of your PATH environment variable. You can do this by adding the following line at the bottom of your ~/.profile file

export PATH="/usr/local/opt/python/libexec/bin:$PATH"

If you have OS X 10.12 (Sierra) or older use this line instead

export PATH=/usr/local/bin:/usr/local/sbin:$PATH

Now, we can install Python 3:

$ brew install python

This will take a minute or two.

Pip

Homebrew installs pip pointing to the Homebrew’d Python 3 for you.

Answer 3

Use Python 3 as the macOS default

Python's website has a macOS Python 3 installer we can download and use. If we use the package installation, a python3 fill will be available in /usr/local/bin/.

Aliasing is a must since the Python binary stored in /usr/bin/ can't be changed. What's nice about an alias is that it's specific to our command-line shell. Since I use ssh by default, I put the following into the .zshrc file:

$ echo "alias python=/usr/local/bin/python3.7" >> ~/.zshrc

If you are using the default Bash shell, you can append this same text to your .bashrc:

$ echo "alias python=/usr/local/bin/python3.7" >> ~/.bashrc

Answer 4

Prerequisites

You will need a macOS computer with administrative access that is connected to the internet.

Step 1 — Opening Terminal

The macOS Terminal is an application you can use to access the command line interface. Like any other application, you can find it by going into Finder, navigating to the Applications folder, and then into the Utilities folder. From here, double-click the Terminal like any other application to open it up. Alternatively, you can use Spotlight by holding down the command and spacebar keys to find Terminal by typing it out in the box that appears.

Step 2 — Installing Xcode

Xcode is an integrated development environment (IDE) that is comprised of software development tools for macOS. You may have Xcode installed already. To check, in your Terminal window, type:

• xcode-select -p

Copy

If you receive the following output, then Xcode is installed:

Output

/Library/Developer/CommandLineTools

Step 3 — Installing and Setting Up Homebrew

While the OS X Terminal has a lot of the functionality of Linux Terminals and other Unix systems, it does not ship with a good package manager. A package manager is a collection of software tools that work to automate installation processes that include initial software installation, upgrading and configuring of software, and removing software as needed. They keep installations in a central location and can maintain all software packages on the system in formats that are commonly used. Homebrew provides OS X with a free and open-source software package managing system that simplifies the installation of software on OS X.

To install Homebrew, type this into your Terminal window:

• /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install