I am trying to get Protractor up and running following the official Getting Started Guide.
The command
webdriver-manager start
seem
For Mac users:
Under the 'angular-phonecat' folder, run npm install chromedriver. This will install the chrome driver into the folder node_modules/chromedriver. After this, you should modify the test/protractor-conf.js, pointing it to the new chromedriver folder, by adding this line:
chromeDriver:'../node_modules/chromedriver/bin/chromedriver',
Finally, you will run successfully the command npm run protractor (don't forget that npm start should be run first).