Hi
I got it work on a trial version of MC7 macbook pro – to test it.
Make sure MC is closed then connect thunderbolt to HDMI to your HDMI monitor, in my case a Sony Bravia
TV.
In system settings make sure the HDMI monitor is set to 1920 x 1080.
Then boot up MC click on full screen mode settings and move the dialogue box over to your monitor and click use this monitor.
It took a while to get it to work because I think if you don’t do it in the order above it causes difficulties.
Hope this helps.
JB