=> Unlinking Binary '/usr/local/bin/chromedriver'.

I found out that I should do: brew updateĪnother option is to uninstall and install it again like this: brew cask uninstall chromedriver Note: The answer below was given for an older version and may not work anymore Then on the next run, you'll have to click 'Open' once. Also be aware that after each upgrade you will get again a system warning when using the chromedriver for the first time so you need to click Cancel in the warning and then go to 'Preferences => Security & Privacy' and click 'Allow Anyway' to accept the risk.