Back to Arduino Support

Error: Symbol not found environ

Arduino AVR Boards 1.6.12 and newer require macOS 10.8 Mountain Lion or newer. If you want to use an older version of macOS, you will need to roll back to the last compatible version of Arduino AVR Boards. Follow these steps:

  1. Open Tools > Board > Boards Manager
  2. Wait for the downloads to finish
  3. Click on “Arduino AVR Boards”
  4. Select “1.6.11” from the “select version” drop down menu
  5. Click “Install”.
  6. Wait for installation to finish.
  7. Click “Close”.

Due to a bug, this workaround doesn’t work with Arduino IDE 1.8.6, but it will work with any other version of the Arduino IDE.

If you have update notifications enabled, you will need to refrain from updating to a newer version of Arduino AVR Boards.

  • Last edited:
Was this article helpful?
Do you want to contribute? Visit the Github repository
Return to top

Didn’t find what you were looking for?

Arduino Docs

Tutorials, data sheets, guides and other technical documentation.

Arduino Forum

Connect with the community, get help with your project, and discuss everything Arduino.

Arduino Discord

There are a lot of Arduino enthusiasts who are more than willing to help out. Head over Discord to start a discussion.

Contact Arduino

Need help with a product, need to make an exchange, or can't find a question answered? Email us and we'll answer as soon as possible.