OnDemand has NOT been working with external providers since 08/22
User can NOT login to OnDemand (ondemand.osc.edu) with external providers after yesterday's downtime (August 22, 2017)
User can NOT login to OnDemand (ondemand.osc.edu) with external providers after yesterday's downtime (August 22, 2017)
Since the 10.9.5 OS X update, Apple has changed its security model to only support applications from the Mac App Store and identified developers. This has caused OnDemand apps to fail to run with the error:
"'x.jnlp' can't be opened because it is from an unidentified developer."
To workaround this change, go to System Preferences -> Security & Privacy:

Click the lock button to make changes: