I am unable to complete splunk 7.1.2 installation on my Mac OS 10.13. I did not get the splunk's little helper window. Kindly help me out.

I followed the procedure mentioned in the third module of splunk fundamentals 1 course to install splunk on Mac OS 10.13. all the steps were completed , splunk short cut icon is created on the desktop too. but I did not get the terminal window or splunks little helper which asks for password.