How to get to 800K on a mac?

  • I have seen posts saying that it is possible to get under 1200K, the lowest setting on the f.lux sliding bar, by pressing alt+shift+page up/page down. However, Macs do not have the page up/page down key, and when I tried using the alternative on a mac for that key (fn+up arrow/down arrow), that did not seem to work. Does anyone know how to get down to 800K on a mac?