Some of our users have recently reported delays in response from the Q-Widget to QLab. The delay is seemingly random. When the user pushes a button, QLab does not immediately respond, but does respond seconds later.
A "feature" in OS X 10.9+ allows an app to take a nap if it is not the foremost application on the screen. Our driver that sends commands to QLab is a background app that we believe could be affected by this.
1. We are currently testing this potential issue to see if our theory has any merit. If so, a driver update will be forthcoming.
2. We are still developing a MIDI-over-USB implementation for the Q-Widget that would allow it to work without an intermediate driver.