MacOS Catalina Bug

testesttest8889

Flux doesn't seem to work on latest Catalina OS. After turning it on, it flashes and colors/temp looks weird.

herf

Which hardware are you using?
Also do you have access to the Feedback Assistant (beta or developer)?

squakoon

The same problem.
MacBook Pro (15-inch, 2018)

herf

Anyone reading this: if you have Feedback Assistant, please send a report to Apple (we can't report it otherwise).

For general troubleshooting:

Try disabling automatic brightness - does it help?
Try disabling automatic GPU switching if you have two GPUs

_Paul

Can confirm - I have the same problem. (Macbook Pro 13 inch, 2018).

This device does not feature a second GPU.
Disabling automatic brightness does not fix the behavior (looks the same).

Tourdi

@testesttest8889 I confirm, Flux doesn't work correctly on my MacBook Pro 13-inch 2019 with Catalina OS. It flash and look very weird... Closing flux and everything return to normal...

herf

Can someone also test turning off True Tone? A conflict there would make sense, since it's only on the newer models.

bnodvin

2018 MacBook Pro 13-inch with Catalina OS and True Tone off still causes the flashing and colors/temp to look off

_Paul

Yep, True Tone is disabled.

mallardduck

Same issue here. Flux also causes OSX to prompt to grant screen recording permissions. I suspect the latter is just due to the API it uses, but perhaps failing to grant it is what's causing the problem?

herf

This should only be in the about box, which we use to estimate screen brightness. Could add a button you'd have to push if it's too alarming.

makkesebbe

F.lux didn't work for me either when I installed Catalina, but when I ticked "true tone" box it started working normally again.

herf

Anyone with "Feedback Assistant" please send a note to Apple for us?

Has to be done on a machine that's affected, and we haven't bought a new MBP yet. :)

_Paul

Just a small report from me - everything works now. I haven't changed anything nor updated something, yet it started to work normally again. Maybe this is only in the first few hours after upgrading?

herf

@_paul Okay so maybe this is a True tone conflict, it just takes some time to actually turn off?

testesttest8889

Still experiencing same problem, turning of True Tone/Auto Brightness didn't help

arthurio

For me it works when my external display is plugged in. As soon as I unplug it everything starts flickering and the color filter is only showing around the UI elements, on and off.

As other mentioned, True tone and auto brightness don't change a thing.

denschub

Just for the record, I highly doubt this issue is related to f.lux. As far as I can tell, f.lux is simply feeding a color profile to macOS, and there seems to be a general color profile issue going on in Catalina.

I have custom monitor calibration profiles (from a calibration device), and macOS randomly ignored the profile. As far as I can tell, most of the time, macOS decides to apply the color profile correctly for everything except for pure white. #fff is always rendered as #fff, even though the color profile might tint it differently. In f.lux, this is especially harsh since everything white will glow really bright next to the red'ish colors.

I have reported several issues in regards to color profiles in Catalina via the Feedback Assistant.

ssully

Same issue on MBP 15,4. Haven't yet noticed the problem on iMac 18,3 with additional external display.

For what it's worth, a system restart fixes this bug for me, at least until a subsequent sleep/wake cycle. (Merely restarting f.lux does not fix the bug, though obviously the flashing effect ceases when f.lux is disabled.)

NYCortex

In case it helps this is happening on my macbook pro since installing Catalina. It also happens with another similar app called Iris.