I don’t know if this will help or not, but I found this on a forum where other people were having the same problem:
“One of my coworkers just had the same problem. he has qmaster 2.0 and compressor 2.0.
What we eventually figured out our problem to be was that qmaster didn’t even start up at start up. in the system log it showed it under a ‘disabled startup item’
looking in the apple info database i found this
https://docs.info.apple.com/article.html?artnum=300962
down at the bottom it has now to enable a previously disabled startup item
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I disabled a startup item, but now I want to use it
If you disabled a startup item but you’re now certain that it’s associated with a trusted application, you can install the application again. Or, if you’re an advanced user (and an administrator) who’s familiar with Terminal, you can use the following steps instead of reinstalling the application (we’re using “TrustedApp” as our example application; please substitute it with your trusted application’s name):
1. Open Terminal (in /Applications/Utilities).
2. Type the following line, then press Return:
cd /Library/StartupItems/TrustedApp.app/
3. Type the following line, then press Return:
sudo rm .disabled
4. From the Apple menu, choose Restart.
5. When you see the alert about the startup item you want to use, click Fix.
6. Click Restart in the second alert. After your computer restarts, the item should work as expected.
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the moral of the story is that a tiny invisible file called .disabled prevents qmaster from loading. delete that and it allowed us to get back to workin’
unfourtunately you can’t delete (or even see) that file without the terminal.”
HTH.
Leigh Thomas