I have a Mac Pro 6,1 (late 2013) with Yosemite 10.10.5. Mercury Transmit recently broke in AE C15 and will no longer play video fullscreen on my second monitor. Nothing in my setup has changed both hardware and software.
I've searched for answers but can only find recent posts about El Capitan breaking Mercury Transmit. I have also looked around for a preference file to delete that would possibly reset Mercury Transmit. I have already checked and unchecked the "enable" button as well as my monitor. I have unchecked, shutdown, rechecked and still no change.