High Sierra version 10.13.4 does not retain monitor brightness after a restart. This is critical for photography. Has anyone been confronted with this issue and can it be fixed?
iMac Pro, macOS High Sierra (10.13.4)
They screwed something up in iMac Pro firmware, which was apparently rolled into the 10.13.4 software update. I think their kext files that control brightness settings are not working with the new firmware. You might want to broach this with them.
Wanted to update everyone regarding Apple's response to this issue. I was informed at the end of last week that engineering was able to duplicate the issue on their end. They finally realized based on numerous complaints that this a problem that was caused with their last update. They said that the problem will probably be resolved with the next major update. I asked them to contact me immediately when it has been resolved.
Have you tried the iMac Pro community to see if any there has a similar problem or even better a solution, iMac Pro
I figured as much. Per my earlier message, I downgraded to the 10.13.3 -- the build it came with -- and the problem remained. Must be a firmware issue. Strange that there has not been more noise about it.
Hi Gene,
The information regarding the firmware update has been passed along to Apple. Thanks for the information. I hope others continue to post and express their concerns regarding this issue with this forum. It's apparent after a clean install that the problem lies with the OS and they need to address it.
I concur with the "not surprising" part, but not because of the update's focus on security fixes. Apple has known about this issue -- which clearly disrupts workflows of many iMac Pro owners -- for at least 2 months now. The fact that they did not deem the issue to be important enough to include a fix in 10.13.5 is egregious, but, I agree, not surprising.
So, I reverted to 10.13.3 (from recovery) and the iMac Pro still does not remember the brightness level on restart. Must be a firmware issue.
Have you contacted Apple support since 10.13.5 dropped without providing resolution to this problem?
Thank you Eau for your response. I didn't fully explain my issue with my initial post. The monitor is calibrated with x-rite software and equipment. It has been since the beginning. The problem is with the brightness control. Everything was working just fine until I did the latest update of the OS and the problem then started. I have done everything possible to correct the issue including a reinstall of the OS and that has not resolved the issue. Apple support has tried to assist and they are also confused.
Eau, thanks again for the advice. Removing the system preference file did not do the trick. I received another call from support today, just to tell me that the engineers are now looking into this. I hope they are getting plenty of complaints so they can prioritize in resolving this issue. I am starting to reconsider the option of applying updates when they come out. Since High Sierra came out, I have been having issues with the software. As an example, taking a screen shot or downloading a simple pdf takes really long to appear on the my desktop. These are minor issues, but non the less they are annoying, especially when you are limited in time.
Thanks. Keep us posted. I think they broke something in the Apple.Backlight.kext or Apple.BacklightExpert.kext. or both. But who knows... I fear we will probably have to live with this until the next High Sierra update (or maybe supplemental update.) Frankly it's perplexing that after so many betas, the final release breaks Apple's flagship product.
A member on MacRumors forums claims the issue did not exist for him in 10.13.3 on his iMac Pro, and that there was an iMac Pro firmware update bundled with 10.13.4. I cannot verify the latter, but I am pretty sure I would have noticed the former, had it been present before the update.
Gene
I wanted to reply and let everyone know that I worked with Apple this past Friday. No solution was provided. Several plist files were deleted, but that didn't help. I had to send an actual video of the problem occurring after a restart. Guess they didn't believe my assessment of the problem. This is now back to engineering. Lets see what they attempt next.
Gene, all true and to the point. The problem is not just isolated to the brightness control. The keyboard responses are delayed and overall ability to copy or save has also been extremely affected. Whatever Apple has done with the last couple of updates has crippled the iMac Pro. I hope they resolve this issue very soon.
Hi Gene,
Thank you for pointing it out to me regarding the Auto Brightness Adjustment. I didn't realize it was checked. You are absolutely right, the problem hasn't gone away. I just called Apple and left a message. Hopefully the person assign to my case will inform engineering. Stay tune for further developments. In regards to your question, the clean install took me to version 10.13.4 and I did not have to update the software on my system.
Eddie
monitor brightness changes after restart with High Sierra 10.13.4
