While that&#x27;s true, f.lux handles edge cases in important ways -- letting you disable it for certain apps or time periods, as well as &quot;movie mode.&quot; As much as I&#x27;d like to see this feature be built into the OS, Apple tends to simplify away a lot of fiddly preferences by choosing what they hope are sensible defaults, and as much as I appreciate that in theory, in practice this might be one of those areas where fiddly preferences are superior.