There are two formulas for installing Python with Homebrew: and python. If you prefer to recover a previously installed version, then: brew info python # To see what you have previously installed The commands to install brew are provided below.To make a clean install of Python 3.6.5 use: brew unlink python # ONLY if you have installed (with brew) another version of python 3 It's a widely used dependency manager for Mac OS that provides installation packages for many open-source software projects. Many developers may already have homebrew installed. We will walk through the most common installation scenarios here, but if you encounter issues, consult the full installation instructions for the project: ĭifferent operating systems have different dependency needs, the latest of which are documented here: Installing pyenv on Mac OS using homebrew # virtualenv is still widely used - but it lacks some crucial features that pyenv provides for standardized installation methods.

Prior to pyenv becoming popular, many python developers used virtualenv to manage environment versions. It's similar to the better-known tool that is commonly used in ruby development - rbenv. It allows developers to define which version of python to use on a per-project basis. Pyenv is an open-source tool used for managing multiple python environments. Fortunately, there is a tool called pyenv that will allow us to safely install the latest python version - regardless of whether we have a system python version installed or not. Updating it can break certain tools that our operating system needs for essential tasks, including dependency management software. In cases where older are versions present, it is unsafe to update system python directly.

In other cases, the command above could fail completely, indicting that python is not installed at all. The output above indicates that the system version of python installed is much older than 3.7.

Brew install python3