Note that autobrightness with f.lux is currently broken in OS X 10.11, and they suggest you to disable it: &quot;Note for people using f.lux on El Capitan (10.11): The new version of &quot;Automatically adjust brightness&quot; in El Capitan seems to cause flickering with f.lux. For the moment, you&#x27;ll have to turn this feature off to use f.lux.
To make the fix, use System Preferences &gt; Displays and uncheck. Occasionally, a reboot may also be necessary.&quot; [0]<p>[0]: <a href="https:&#x2F;&#x2F;justgetflux.com&#x2F;news&#x2F;pages&#x2F;macquickstart&#x2F;" rel="nofollow">https:&#x2F;&#x2F;justgetflux.com&#x2F;news&#x2F;pages&#x2F;macquickstart&#x2F;</a>