Hpw Does One Turn Of Imac Display When Using It Through A Tv

[Nightcleaner]

If I want to watch a movie and I do not want both displays running


In windows its a very simple operation.

But have not discovered yet how to on An Imac

[Buenchico]

This thread started 7 years ago but has some quite recent contributions:
http://forums.macrumors.com/threads/how-to-turn-off-imac-screen-but-leave-secondary-screen-on.838040/

Scroll down to near the bottom of the first page to read about a free app suggested by pmt24mac. (Others have then posted to say that it works for them). If you need instructions to install it, colnago1331 provides them near to the bottom of the second page.