I'm having the same problem on Mac OS 10.8.5 only, not on my other slave computers that are running 10.9 nor my main system running 10.11.6. If I try to open either the VEP Standalone or Server I get the same message as Osamu. The exact dialog box says:
Vienna Ensemble Pro cannot be opened because of a problem.
Check with the developer to make sure Vienna Ensemble Pro works with this version of OS X. You may need to reinstall the application. Be sure to install any available updates for the application and OS X.
Click Report to see more detailed information and send a report to Apple.
I also have ProTools 10 and 11 installed on this system. If I try to launch ProTools, I get an error message that says:
ProTools could not load the following plug-ins either because no valid authorization could be found, the iLok key was not connected or the plug-in was damaged:
Vienna Ensemble Pro Audio Input.aaxplugin
Vienna Ensemble Pro.aaxplugin
I double checked that both my eLicenser and iLok installers/drivers are the most recent versions downloaded from their respective sites (although I realize the iLok isn't used here).
Any ideas how to get this most recent version to open?
Thanks,
Kristopher