P: People Masking fails on Mac (Intel)

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The evidence now more strongly points to a problem with the AMD graphics drivers introduced in Mac OS 26.3.0 (release on 2/11/26).  While we should hope and expect Adobe to be in contact with Apple developers providing technical details, it's up to Apple and AMD to provide fixed drivers.

Apple has released buggy AMD drivers affecting many LR users at least twice before, in 2023 and 2024, and each time it took Apple 5 months to release fixed drivers.

Details

Here's a summary of all the reports of People masking failing where users have provided System Info:

There are no reports prior to Mac OS 26.3.0. If the problem were not tied to Mac OS 26.3.0, but instead was something introduced by LR 15.2, we almost certainly would have seen at least a few reports on Mac OS 26.2, since many users defer updating Mac OS for weeks and months (I'm still on 26.2).

Further, user @Lalocakayak reported the problem started immediately after updating from Mac OS 15 to Mac OS 26.3.1 with LR 14.4.1.

Prior Incidents

- Starting 4/2/23 on Mac OS 13.3 (released 3/27/23), users of LR started reporting People masking failing with AMD 5700 and 5800 GPUs:

https://community.adobe.com/bug-reports-674/p-mac-people-masks-selections-are-not-as-expected-entire-screen-or-square-area-664047/index3.html?postid=664047#post664047

Many reported that Mac OS 14.0 (9/26/23) fixed the issue, though there were a few reports that the symptoms came back in 14.1 or 14.2.  There were no reports for Mac OS 14.3 or later.

- Starting 4/1/24 on Mac OS 14.4.1 (released 3/25/24), many Intel Mac LR users with AMD 500- and 5000-series GPUs started reporting strange image artifacts in rendered raws:

https://community.adobe.com/questions-675/p-gpu-develop-edit-view-export-artifacts-after-14-4-1-update-amd-only-affects-cr-lrc-lrd-981379/index3.html?postid=981379#post981379

Four weeks later, Adobe employee Rikk Flohr posted that it was an Apple/AMD problem:

https://community.adobe.com/questions-675/p-gpu-develop-edit-view-export-artifacts-after-14-4-1-update-amd-only-affects-cr-lrc-lrd-981379/index3.html?postid=4028115#post4028115

After Mac OS 15.0 was released 9/16/24, most users reported the problem was fixed.

Lightroom cannot detect people in the create new mask section. It scans and says “no people found.” It used to be great, but now it can’t do it at all. I have done the most recent updates to both LR and my iMac which has 3.3 GHz 6-Core Intel Core i5, graphics AMD Radeon Pro 5300 4 GB, with128 GB 2667 MHz DDR4.

Please let me know if there is a fix for this. 

I’ve had the same problem for several weeks.  Adobe - fix this!

 

Lightroom Classic version: 15.2.1 [ 202603161217-0bf813d9 ]
License: Creative Cloud
Language setting: en-US
Operating system: Mac OS 26
Version: 26.3.1 [25D2128]
Application architecture: x64
Logical processor count: 20
Processor speed: 3.6GHz
SqLite Version: 3.36.0
Adobe GSDK Version: 1.4.0.212

Built-in memory: 40,960.0 MB
Dedicated GPU memory used by Lightroom: 2,997.2MB / 8,176.0MB (36%)
Real memory available to Lightroom: 40,960.0 MB
Real memory used by Lightroom: 4,981.8 MB (12.1%)
Virtual memory used by Lightroom: 54,342.5 MB
Memory cache size: 1,254.7MB
Internal Camera Raw version: 18.2.2 [ 2512 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 252MB / 20479MB (1%)
Camera Raw real memory: 328MB / 40960MB (0%)

Hey @droscoe

Thanks so much for sharing your OS version—that’s really helpful. To better understand what might be causing this, could you also share the exact ACR version you’re using? You can find it in Photoshop or Lightroom under Help > System Info. Just copy the details into a text file and attach it to your reply.

^CM

Are you using an Intel Mac?  Please do the LR menu command Help > System Info and copy/paste the entire contents here so we can see exactly which versions of hardware and software LR thinks you're running and important LR options that are set.

in ACR masking all works well ie ie Landscape , background, subject etc but find people always returns “unable to find people”. 

I have reset graphics and restarted with no success

Are you using Windows? If so, check the website of your GPU manufacturer for driver updates. If you use a Ndvia GPU, then make sure you install the Studio drivers, not the Game Ready drivers.

Lightroom is no longer able to detect people in my photos, while using the mask module. When I choose, “Select People”, it says “No People Found”, when there is obviously people in the photo.

I have the same problem. I can't select the character because it's invisible, and I can't remove the background because it's impossible. I've tried everything, including deleting and reinstalling, and cleaning the library. The problem is serious and significantly limits my work. The problem appeared after the last Photoshop update... I see that the AI ​​is having a problem.