Error loading in mopidy

I am trying to laod htis onto my OSX and I get this error -
anyone familiar with this error?

Traceback (most recent call last):
File “/usr/local/bin/mopidy”, line 6, in
from pkg_resources import load_entry_point
File “build/bdist.macosx-10.6-x86_64/egg/pkg_resources/”, line 2985, in
File “build/bdist.macosx-10.6-x86_64/egg/pkg_resources/”, line 2971, in _call_aside
File “build/bdist.macosx-10.6-x86_64/egg/pkg_resources/”, line 2998, in _initialize_master_working_set
File “build/bdist.macosx-10.6-x86_64/egg/pkg_resources/”, line 660, in _build_master
File “build/bdist.macosx-10.6-x86_64/egg/pkg_resources/”, line 968, in require
File “build/bdist.macosx-10.6-x86_64/egg/pkg_resources/”, line 854, in resolve
pkg_resources.DistributionNotFound: The ‘Mopidy==2.1.0’ distribution was not found and is required by the application