Hi,
I have encountered the same issue and finally got it solved. I’m running Mavericks 10.9.2, Eucontrol 3.1.2 and Resolve 10.1.2.
As Luca De Grandis suggests, it is the App Nap that is causing the problem.
And for those who run into this thread looking for a solution:
Normally, you can use Finder, navigate to EuControl and MC_Client, right click, click on “Get Info”, then check on the “Prevent App Nap” checkbox. This should solve the problem.
Strange thing is, I don’t have such a checkbox there. I do have them for other apps like Davinci Resolve. I had to open Terminal and run the command as below:
defaults write com.avid.eucontrol NSAppSleepDisabled -bool YES
Now everything seems to be ok.