Unable to find the chromedriver executable

For other people on MacOS:

brew cask install chromedriver

And you'll be good to go.

If using Homebrew 2.6.0 (released in 2020.12.01) or above, you should use:

brew install --cask chromedriver

Please download the server from http://code.google.com/p/chromedriver/downloads/list and place it somewhere on your PATH. More info at https://github.com/SeleniumHQ/selenium/wiki/ChromeDriver.

UPD: Link that is not broken: https://sites.google.com/a/chromium.org/chromedriver/downloads