Why am I receiving this index installation error on Macbook Pro?

[palnapatel]

(clear; '/Applications/Splunk/bin/splunk' start || touch "/tmp/splunk_start_failed_30474"); rm "/tmp/splunk_start_running_9947"

Splunk> Winning the War on Error

Checking prerequisites...
    Checking http port [8000]: open
    Checking mgmt port [8089]: open
    Checking appserver port [127.0.0.1:8065]: open
    Checking kvstore port [8191]: open
    Checking configuration...  Done.
    Checking critical directories...    Done
    Checking indexes...
homePath='/Applications/Splunk/var/lib/splunk/audit/db' of index=_audit on unusable filesystem.
Validating databases (splunkd validatedb) failed with code '1'.  If you cannot resolve the issue(s) above after consulting documentation, please file a case online at http://www.splunk.com/page/submit_issue

This is the error that I am getting and I have a Macbook Pro. I need help.

[micahkemp]

This previous answers post should answer your question.