How to resolve chromedriver cannot be opened because the developer cannot be verified in mac?

How to add ChromeDriver path in Selenium for Mac?

How do I add a path to the ChromeDriver?

For Mac. I am using Selenium 2.29.1.

In Windows you just right click on the path of your installation and select browse, navigate to where you want to add a path then add that path. The equivalent for mac and windows is not showing up in my Selenium options/settings. I have also tried to manually add paths such as /Users/me/selenium-chromedriver but none of those work either. How do I add this path? Selenium 2.30 and 3.0 beta
For Mac OS, when you use Selenium IDE 3.0 Beta you need to add path to chromeDriver manually.

Select "New" - "Web Browser", then add "Chrome", select "Default (Chrome)", then press "OK" button.

How do you fix chromedriver can t be opened because Apple cannot check it for malicious software?

You have two choices: Uninstall the "ChromeDriver" via ChromeDriver.

Download and Install the latest version of ChromeDriver from here. For Option 2: You can check for updates automatically. The installer automatically updates the Chromedriver when new versions are available. To do this:
In chrome. In the address bar, type about:config. (The about: section in the address bar indicates that the page is about configuration.) Click on the entry called browser.download.notify
Under the value, enter the number to change it. In this example, we want the number to be 1, so the final value will be browser.notify=1
Click on Ok. The installer should update your Chromedriver if you have an up to date version.

For more information check this question.