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    MacOS Catalina Bug

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    • herfH
      herf
      last edited by

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

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      • B
        bnodvin
        last edited by

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

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        • _
          _Paul
          last edited by

          Yep, True Tone is disabled.

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          • M
            mallardduck
            last edited by

            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?

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            • herfH
              herf
              last edited by

              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.

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              • M
                makkesebbe
                last edited by 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.

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                • herfH
                  herf
                  last edited by

                  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. :)

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                  • _
                    _Paul
                    last edited by

                    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?

                    herfH 1 Reply Last reply Reply Quote 1
                    • herfH
                      herf @_Paul
                      last edited by herf

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

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                      • T
                        testesttest8889
                        last edited by

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

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                        • A
                          arthurio
                          last edited by

                          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.

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                          • D
                            denschub
                            last edited by

                            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.

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                            • S
                              ssully
                              last edited by

                              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.)

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                              • N
                                NYCortex
                                last edited by

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

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                                • M
                                  mallardduck
                                  last edited by

                                  Have true tone disabled, have night shift disabled, and no external monitor. With flux running the screen flickers and changes color on a regular/random basis.

                                  Have the issue with both stock and custom profiles. It's definitely a flux/catalina incompatibility. Now, on who's end I can't say :-).

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                                  • B
                                    bnodvin
                                    last edited by

                                    any update on whether this will be fixed?

                                    herfH 1 Reply Last reply Reply Quote 0
                                    • herfH
                                      herf @bnodvin
                                      last edited by

                                      @bnodvin we do not have a workaround.

                                      As above, anyone with "Feedback Assistant" please send a note to Apple for us?

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                                      • _
                                        _Paul
                                        last edited by

                                        And it's back again after installing the latest update. :-(

                                        herf: Any way to get that feedback app without being a developer?

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                                        • X
                                          xstfc
                                          last edited by

                                          I'm seeing this issue as well. In case it's helpful, here's a short (1 min.) video to give you an idea what's happening. As you can see onscreen in the video, both True Tone and automatic brightness are already disabled.

                                          https://imgur.com/a/EMWNknw

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                                          • herfH
                                            herf
                                            last edited by

                                            Two things:

                                            1. How many of you have a dual-GPU mac, vs. integrated only?
                                            2. Does it help (in either case) to enable writeProfile using these instructions?
                                              https://justgetflux.com/news/2014/10/28/profile.html

                                            defaults write org.herf.Flux writeProfile 1

                                            If this is happening mostly on discrete GPU macs, it's possible that the new security parameters in Catalina are preventing f.lux from noticing it's a dual GPU machine (which I had not considered before).

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