I've had gfxCardStatus on my machine for over a year. Changing the GPU has no effect.

I also tried using a completely new Firefox profile--didn't solve the problem.

The behavior is limited to Firefox and seems entirely isolated to my user account.

The only other culprit I can think of (I'm grasping at straws
here) is SIMBL, which I've used for a few years to get back the look of a transparent launch pad.

Other than that, I'm ready to give up and create a new
user account and move "non-controversial" stuff over
there. (Been using Safari lately, but don't like its UI very much).

Still on Mojave 10.14.6 I thought I'd report back as f.lux is working again after I created a test account to see if something's wrong with my current account and f.lux would work in the new account. It did and now it also works again in my old account... It's totally unclear to me why but somehow this also resulted in display profiles working again.

I am experiencing the same issue.

This forum thread may be related: https://forum.justgetflux.com/topic/7228/catalina-10-15-1-19b88-cursor-not-effected

@herf Makes sense. Thanks for the clarification.

For what it's worth, the "Melantopic Light (vs. white)" calculator in f.lux's "about" box seems to be working just fine, even though I haven't granted f.lux permission to "record" the screen.

It continues to calculate the ever-changing melantopic light, without triggering the dialog box again.

I did not update the field as I set myself dark mode. I like this version aesthetically. I have not experienced any inconvenience when using it until today. I rejected all requests for updating the system because my mac was working perfectly and I was happy with how it works. But today I noticed that my laptop has become very slow. Could this be due to the old version? I also have problems with memory overflow. Could this be due to memory?

Never mind, I didn't see the icon of the app at the top of the screen. I was able to click on it and quit it that way, and trash it.

Are you saying that this is caused by f.lux?

While using flux on my macOS I also felt the same issue. I felt the issue in flux and iTunes together in my case. I thought it was because of iTunes sync error 54. After fixing that I got to know it was a system error. To fix the flux issue

click start > type control panel > control panel > programas and features > select flux > update it

Thanks, I didn't know about this setting.
Great app by the way!

Mojave is asking permission for us to change these things - I wonder if it might have gotten permission for "dark mode" and not "light mode'?

For the most part, you can use the slider to adjust the "Current" setting, and the tabs are only used to adjust "other" times of day (not the current setting).

If you don't like the range of the sliders, you can expand it in "options".

This problem usually means you need to update to Mojave.

Oh good call, didn't even realize I'd set that.

Just disabled it, will pay attention in the morning.