selenium: [Facebook\WebDriver\Exception\SessionNotCreatedException] Unable to create new service: ChromeDriverService

Meta -

OS: MAC

Selenium Version: 3.6

Browser: Chrome, Firefox

Browser Version:
Chrome Version - 61.0.3163.100

Firefox Version - 56.0 (64-bit)

Expected Behavior -

It should open the browser and script should run

Actual Behavior -

Script is not running.

Check the log here - Selenium Log -

11:52:26.038 INFO - Selenium build info: version: '3.6.0', revision: '6fbf3ec767'
11:52:26.038 INFO - Launching a standalone Selenium Server
2017-10-06 11:52:26.069:INFO::main: Logging initialized @333ms to org.seleniumhq.jetty9.util.log.StdErrLog
11:52:26.135 INFO - Driver class not found: com.opera.core.systems.OperaDriver
11:52:26.172 INFO - Driver provider class org.openqa.selenium.ie.InternetExplorerDriver registration is skipped:
 registration capabilities Capabilities [{ensureCleanSession=true, browserName=internet explorer, version=, platform=WINDOWS}] does not match the current platform MAC
11:52:26.172 INFO - Driver provider class org.openqa.selenium.edge.EdgeDriver registration is skipped:
 registration capabilities Capabilities [{browserName=MicrosoftEdge, version=, platform=WINDOWS}] does not match the current platform MAC
11:52:26.227 INFO - Using the passthrough mode handler
2017-10-06 11:52:26.270:INFO:osjs.Server:main: jetty-9.4.5.v20170502
2017-10-06 11:52:26.303:WARN:osjs.SecurityHandler:main: ServletContext@o.s.j.s.ServletContextHandler@eec5a4a{/,null,STARTING} has uncovered http methods for path: /
2017-10-06 11:52:26.310:INFO:osjsh.ContextHandler:main: Started o.s.j.s.ServletContextHandler@eec5a4a{/,null,AVAILABLE}
2017-10-06 11:52:26.354:INFO:osjs.AbstractConnector:main: Started ServerConnector@9660f4e{HTTP/1.1,[http/1.1]}{0.0.0.0:4444}
2017-10-06 11:52:26.356:INFO:osjs.Server:main: Started @620ms
11:52:26.356 INFO - Selenium Server is up and running
2017-10-06 11:52:38.203:INFO:osjshC.ROOT:qtp971848845-11: org.openqa.selenium.remote.server.WebDriverServlet-28d25987: Initialising WebDriverServlet
11:52:38.254 INFO - Binding default provider to: org.openqa.selenium.chrome.ChromeDriverService
11:52:38.255 INFO - Found handler: org.openqa.selenium.remote.server.commandhandler.BeginSession@124a951f
11:52:38.260 INFO - /session: Executing POST on /session (handler: BeginSession)
11:52:38.326 INFO - Capabilities are: Capabilities {browserName=chrome}
11:52:38.327 INFO - Capabilities {browserName=chrome} matched class org.openqa.selenium.remote.server.ServicedSession$Factory (provider: org.openqa.selenium.chrome.ChromeDriverService)
11:52:38.328 INFO - Capabilities {browserName=chrome} matched class org.openqa.selenium.remote.server.ServicedSession$Factory (provider: org.openqa.selenium.chrome.ChromeDriverService)

Script Log -

Test  tests/acceptance/testCept.php
                                                                                                                                                                                                                                                                                                                                                                                           
  [Facebook\WebDriver\Exception\SessionNotCreatedException] Unable to create new service: ChromeDriverService
Build info: version: '3.6.0', revision: '6fbf3ec767', time: '2017-09-27T16:15:40.131Z'
System info: host: 'krupa.local', ip: '192.168.0.100', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.12.6', java.version: '1.8.0_111'
Driver info: driver.version: unknown  

Steps to reproduce -

I am running my script for codeception test. Once I run the script it thorws the exception shown above.

Please help me to fix this issue.