True Tone Problem Since Update to 10.14.6

I just had a chat with Apple Support on this. It was not yet a known problem for them, but they advised me to perform a NVRAM/PRAM reset: https://support.apple.com/en-us/HT204063

After this procedure the True Tone switches and flickering are gone on my system (it's 15 minutes since performing the procedure, so I guess time will tell, but looking good so far..)

tayfour185 wrote:

Guys, I have a solution for this issue.

The only one who helped correctly was an Egyptian guy from the technical support team in Dubai called Farahat. He advised to reinstall Mojave system after rebooting to recovery. I did that and I had a chance ti test it for 3 hours and the true tone was fine.

I really want to thank that guy.

Sounds a bit too radical indeed. Reinstalling the OS is a great inconvenience while the result is not guaranteed because it will still be the same hardware running the same OS version.

Guys, I have a solution for this issue.

The only one who helped correctly was an Egyptian guy from the technical support team in Dubai called Farahat. He advised to reinstall Mojave system after rebooting to recovery. I did that and I had a chance ti test it for 3 hours and the true tone was fine.

I really want to thank that guy.

Sure, use your backup to restore to the day before you updated.

From what I have experienced since this post was launched confirm what all the contributors said :

nothing seems to solve this problem : reboot, PRAM/VRAM reset, power controller reset, reinstall ...

I did note something though : It happens mainly when you have direct light on the screen.

At the moment I am in front of my window, the light is bright, and since hours I have zero flickering.

While when the light is hitting directly the screen (and then the sensor) it seems to provoke this crazy behavior from blueish to normal.

Both my laptops 2018 15" MacBook Pro at home and 2019 13" MacBook Pro at work are now having this problem.

The only thing they have in common is 10.14.6.

It's now more than a couple of month into it and nothing has been done by Apple, which is extremely annoying.

Same here. PRAM reset did not fix the problem. I had to turn off true tone.

Same issue.

Noticed it a couple of times now, and when it happends you see it going from blue to more white back to blue in seconds sometimes.

Switching of True Tone stops the issue instantly.

System:

• MacBook Pro (13-inch, 2018, Four Thunderbolt 3 Ports)
• Intel Iris Plus Graphics 655 1536 MB
• 10.14.6 (18G87)

It is a software issue; one of their updates blew the truetone switching. Yes I hope they come up with a solution on the next update

Same for me on 2018 macbook pro 13" w/ touchbar.

Especially visible with a white background when surfing on the web : the screen seems to flicker because truetone varies too abruptly instead of gradually.

I've update yesterday and never have this problem before.

Actually after a while of testing, the screen flickering happened again. not too much like before but still happening.

I think the software version 10.14.6 has issues with the new matchbook pro models

Same issue here with MBP 15" i7 2018... Although it only started happening after my display was replaced due to appearance of vertical stripes. Seems like a vicious circle, heh.

PRAM/VRAM reset and reinstall didn't help either, I'll probably take it to a repair shop.

The True Tone glitch problem hit me after I upgraded to macOS 10.14.6 / MBP "13 2018 model almost a month ago. Very annoying!

The problem occurs occasionally and on some specific locations. When the late-afternoon day light shines directly onto the screen sensor, it usually occurs. The screen turns from warm colour to cold one several times in a second. But when the laptop is used at my home where another light condition is around, the glitch never happens.

It seems we have to remind Apple of this issue. So far all tech supports from Apple are nothing but a waste of time. The technicians guys only tell me a long list of routine check-list.

No changes for me,

I have 2 laptops 13" and 15", 2018 and 2019 models, and when I'm sitting against a teal wall, True Tone is flickering like crazy on both of them.

The issue had started with 10.14.6 and since then never resolved. No nvram/pram reset neither upgrading one of the laptops to Catalina helped.

It's extremely annoying and Apple support is just wasting my time, no help at all.

Same problem here, 15-inch 2018 MBP. Very frequent True Tone switches (multiple times / minute) and occasional screen flickering. Started right after the update to 10.14.6.