If you run which python from the Terminal, you should get /usr/bin/python, which is the preinstalled Python try python -version to check which version this is. MacOS comes bundled with a preinstalled version of Python 2. My first check was on the /usr/local/bin directory because I wanted to know whether the python binaries had been linked correctly from Homebrew.$ brew upgrade # Installing Homebrew's Python The brew doctor command gave me the error message saying I had installed kegs without a formula and I should uninstall because it is an outdated and no longer supported python version. I had carried out these installations under Catalina. I had python 2 and 3 installed on my system with Homebrew. It all started with a Homebrew error message after my update to Mac OS Big Sur (Mac OS 11).
First of all, back to my initial situation. I decided to use the version manager Pyenv. There are of course several ways of dealing with this matter. So it has to be easy to install different python versions on your Mac and to switch between them as needed. Switching between the versions is necessary because when you are a developer you might have the need to run your code on a certain version. I found that there must be a problem when you install different Python versions on a Mac and I was looking for an easy way to switch between these versions. I installed python 2 and 3 with Homebrew and after executing these commands I was surprised and found that on my system different python versions were running than I expected. I think some Mac users have python installed on their mac by themselves in one way or another and are surprised when checking the current version with python -V or when checking which python binary is currently being executed with the command which python. There are installation instructions on my blog or you can just go to the Homebrew website and follow the instructions there.īut first of all I would like to describe my initial situation. Before you go on reading this article ensure that Homebrew is installed on your Mac.
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