Hey Lucas, you can launch chrome browser using Selenium Webdriver on Mac in following way:
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
public class GoogleLoginTest{
   public static void main(String[] args) throws InterruptedException {
       WebDriver driver=new ChromeDriver();
       driver.manage().window().maximize();
       driver.manage().timeouts().pageLoadTimeout(1, TimeUnit.SECONDS);
       driver.get("http://google.com/");
   }
}