exec: "python": executable file not found in $PATH

Question

since the last update to Mac OS Monterey 12.3 I get the following error message when compiling my Arduino sketch:

exec: "python": executable file not found in $PATH

Unfortunately, I have not yet been able to find out how to solve this problem.

I would be very grateful for ideas and suggestions.

Answer 1

Four steps are needed:

1. Install python3 using ie Brew:

    brew install python

   python3 is in:

    /opt/homebrew/bin/python3

2. Link Python to python3:

    sudo ln -s /opt/homebrew/bin/python3 /opt/homebrew/bin/python

3. Check if you can execute it from the terminal; ie,

    python --version

   Irrespective of whether you use python --version or python3 --version , it should show python 3 now.

4. Open terminal and execute:

    open /Applications/Arduino.app

It works in my case. It looks like when Arduino is executed from the GUI, it does not read the $PATH properly, so although python is linked to python3, it does not find it.

Answer 2

Problem

In MacOS 12.3 Apple removed python2.7 ( python ) from MacOS.

Solution

What I did to solve this is link python3 to python , I wouldn't recommend it because it's sus, I would recommend you wait until Arduino IDE fixes this issue in a later build. For the time being, you could try their Web IDE: Arduino Editor

However, here are the instructions to link python3 to python :

0. If you don't have python3 installed, install it here in the link below:

   Python Install Page

1. Find your path for the current version of python3 you're using

   which python3

   it'll show up with something like this: /Library/Frameworks/Python.framework/Versions/3.10/bin/python3

2. Copy that and use it to run this command that links python 3 to python . Replace the first file path with where your python3 is.

   ln -s -f INSERT_PATH_OF_PYTHON3 /usr/local/bin/python

   for example:

   ln -s -f /Library/Frameworks/Python.framework/Versions/3.10/bin/python3 /usr/local/bin/python