How to Install Python 3 on Mac OS X

This video explains how to install Python 3 in a Mac OS X, both Mavericks and Yosemite. As the Python website says, "Python 2.x is legacy, Python 3.x is the present and future of the language."
For those who are learning Python on a Mac, it may be slightly frustrating that Apple doesn't provide the latest version, typically used when learning Python these days.
The easiest way is to download the Mac installer,

Install it by following the steps in the GUI, go to terminal and to start python type,

python3

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[bevintx]

Python 2.x is already installed on macOS. If you start Python via the bare "python" command in Terminal, then by default you will get Python 2.x -- not the Python 3.x that you just installed. You can see this in the video, where it shows the Python version at around 5:27 min as:

Python 2.7.6 (default, Sep 9 2014, 15:04:36)
[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-6-00.0.39)] on darwin

To use your Python 3 installation, use "python3" to start Python in Terminal and you will see something like the following:

Python 3.6.0 (v3.6.0:41df79263a11, Dec 22 2016, 17:23:13)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin

[RafiAliKhan]

Instead of typing "Python" you should type "Python3".

Python - is reserved for Python2, so always use Python3.

Do not try to make python 3 as default - since this might break other programs that run python 2.

Instead of using Terminal, you can use IDLE - which comes with Python installation to run your commands.

[jonathangeorge]

Thank you for this helpful video :) Thank you for giving clear directions. Everything worked well for me!

[Random-DX]

Thanks man it helped a lot... I'm just getting started with it... I was confused that where to write commands... Now i know.

[kas]

Very helpful and easily explained for a complete beginner such as myself - Thanks

[sharikk]

you installed python 3 but on terminal it is showing 2.7 ?

[sandak]

how to install pycharm in macbook pro version 10.7.5 ?

[tonyyang]

Thanks for your sharing. Python 2.7 and 3.7 are both working on my Mac.

[alexandermrkich]

Thank you. I found the video very helpful.

[mudskippy]

Thank you! It would have been interesting to see the "Customize" Step under "Installation Type".

[mapofage]

From Japan, Thank You. I have installed python!

[helenauscanga]

Am I able to use QGIS 3.4 If I download this software? Thank you :)

[shibujoseukken]

Do u have any iron python winform creation classes?

[siik-ghostface]

I remember this, use to experiment with Python on windows 7 laptop a few years ago. still cool software tool.

[GurmeetSingh-fruo]

I have installed python on my new MacBook Pro. Idle is showing I have version 3.7.1 but the terminal shows 2.7.10 when I type python -V in terminal. Please assist.

[marshalimmanuel]

Good tutorial for beginners (like me). Thanks!

[andreaesthetica]

Thank you so much - clear video. Exactly what I needed.

[technolizard]

there is a major flaw while demonstrating through terminal, without noticing that it uses python2.x not python3.x which is installed externally, please correct that with some comments in the video itself ...

[leo]

Guy: German
Accent: Indian
Comments: English

[aimanjamsariaj]

Thanks! The best video on guide to install python. Thumbs up!