[Ayla]

Thanks for all the help, the problem is now fixed.

If anyone else runs into this problem, you need to make sure that the correct python is being used.

For me, when installing python with brew and psutil with pip install, I need to use:
/usr/local/bin/python

I also needed to add that full path in my launchd plist (which starts HTPC-Manager on reboot):

Code:

<key>ProgramArguments</key>
        <array>
                <string>/usr/local/bin/python</string>
                <string>/Applications/HTPC-Manager/Htpc.py</string>
        </array>