Python 2.7 Free Download For Mac

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If you're using Mac OS (OpenSesame 3.3.5 build 1) and experience an error related to freetype, download the latest Mac OS package (3.3.5 build 2).

What would you like to do?

Overview

  • All download options
  • Tips

All download options

The latest stable version is 3.3.5 Lentiform Loewenfeld, released on Oct 9, 2020 (release notes).

Windows

The standard download is based on Python 3.7 for 64 bit systems. The installer and .zip packages are identical, except for the installation.

The Megapack is identical to the standard Python 3.7 download above, except that it comes with a large number of libraries for scientific computing pre-installed.

Some Python packages are not compatible with Python 3. If you want to use those, please download the Python 2.7 (64 bit) package below. Note: As of January 1, 2020, Python 2.7 is no longer maintained.

Mac OS

This article on the Mac OS support site explains how to override the security settings of Mac OS that will by default prevent OpenSesame from launching.

Ubuntu

OpenSesame 3.3 is available through the Cogscinl PPA. To add this repository to your software sources and install OpenSesame, run the following commands in a terminal:

Some commonly used packages are not available through the PPA. You can install them through pip:

Anaconda (cross-platform)

First, create a new Python environment for OpenSesame (optional):

Next, add the relevant channels (cogsci) and (conda-forge) and install all relevant packages:

Some packages are not available through conda. You can use pip install for these.

Once you have installed all packages, you can simply run OpenSesame by (after having activated the correct environment) running:

Or for the Rapunzel code editor:

Older versions

Older versions can be downloaded from GitHub releases:

Source code

The source code of OpenSesame is available on GitHub.

Tips

Python 2.7 Free Download For Mac

Which version of Python to use?

OpenSesame is currently built with Python 3.7.6 (standard package) and Python 2.7.15.

When (not) to update?

  • Update while developing and testing your experiment; it is always best to use the latest version of OpenSesame.
  • Do not update while running an experiment; that is, do not update while you are collecting data.
  • Run an experiment with the same version of OpenSesame that you used for developing and testing.

Manually upgrading packages

  • OpenSesame is a regular Python environment, and you can upgrade packages with pip or conda as described here:

Python 2.7 Free Download For Mac Download

Tips for system administrators

Download Python 2.7.3

  • When a new major version of OpenSesame is released (with a version ending in 0, e.g. 3.1.0), it is generally followed quickly by one or two maintenance releases (e.g. 3.1.1 and 3.1.2) that address major bugs. Therefore, if you are installing OpenSesame on systems that you do not update often, it is best to wait until the second or third maintenance release (e.g. 3.0.2, 3.1.3, etc.). That way you minimize the risk of rolling out a version of OpenSesame that contains major bugs.
  • The Windows installer allows you to silently install OpenSesame using the /S flag.

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