passcal-osx-10.10-2015.139 install fails on Mac OS 10.11.6

Required Information
Contact Name: 
Justin Ball
Email Address: 
justin.ball@colorado.edu
Having a problem with: 
PASSOFT
Problem specifically with (optional): 
Installer fails on El Cap
Request Type: 
Support Request
Description: 
Hi there- I'm trying to install the latest release of Passoft on my El Cap Mac, and the installer fails early on throwing the attached error message. FYI I've got plenty of free disk space, have run both MacPorts and Homebrew at various times in the past on this machine, and I have some other stuff living in /opt/ already (like Earthworm) in case that matters. Thanks for your time!
Status: 
Open
AttachmentSize
passoftErrMsg.png162.54 KB