P: People Masking fails on Mac (Intel)

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​@Stevie L  Metal: AMD Radeon Pro Vega II

Operating system: Mac OS 26

There are an accumulating number of reports about AMD Radeon GPUs having problems with LR 15’s People masking and perhaps other AI commands also (some of the forum content about this from the last few months is no longer available).

For over a year, LR's AI commands have been tripping over bugs in the graphics drivers for Intel Macs' Radeon 500- and 5000-series GPUs.
 
The drivers in Mac OS 15 appeared to have addressed many of the issues, but there continues to be a steady trickle of reports like yours. It looks like neither Apple nor AMD care much about fixing driver bugs for seven-year-old GPUs on a platform Apple wants to go away.

Perhaps as more people add their reports here, Adobe will use its connections and clout to get the attention of Apple and AMD.  Back with the Mac OS 14 AMD drivers, it took about six months for Apple to release new AMD drivers in Mac OS 15 that fixed the previous round of problems:

Since upgrading to LRC15.2 I also am having this issue.  This also does not in a layer opened with camera RAW filter in PS OR in LR cloud on this machine.

I use this feature all the time and it is really wreaking havoc with my work flows! 

I have tried ALL the commonly suggested resets (e.g. deleting pref files, uninstalling and reinstalling LRC15.2, deleting CR modelzoo folder, disabling GPU acceleration: NOTHING MAKES ANY DIFFERENCE).

Here are my system info settings: 

Lightroom Classic version: 15.2 [ 202602111402-ec4112e8 ]
License: Creative Cloud
Language setting: en-GB
Operating system: Mac OS 26
Version: 26.3.0 [25D125]
Application architecture: x64
Logical processor count: 32
Processor speed: 3.2GHz
SqLite Version: 3.36.0
Adobe GSDK Version: 1.4.0.171

Built-in memory: 393,216.0 MB
Dedicated GPU memory used by Lightroom: 5,883.5MB / 32,752.0MB (17%)
Real memory available to Lightroom: 393,216.0 MB
Real memory used by Lightroom: 3,606.0 MB (0.9%)
Virtual memory used by Lightroom: 56,342.0 MB
Memory cache size: 132.9MB
Internal Camera Raw version: 18.2 [ 2482 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 581MB / 196607MB (0%)
Camera Raw real memory: 649MB / 393216MB (0%)

Cache1: 
Final1- RAM:485.0MB, VRAM:3,062.0MB, P-00787-No-046.RAF
NT- RAM:485.0MB, VRAM:3,062.0MB, Combined:3,547.0MB

Cache2: 
m:132.9MB, n:204.1MB

U-main: 225.0MB

Standard Preview Size: 1440 pixels
Displays: 1) 6016x3384, 2) 5120x2880

Graphics Processor Info: 
Metal: AMD Radeon Pro Vega II
Init State: GPU for Export supported by default
User Preference: Auto
Enable HDR in Library: OFF
GPU for Preview Generation: Off (S5_31)

Application folder: /Applications/Adobe Lightroom Classic
Library Path: /Volumes/FAST VIDEOS/Lightroom/Lightroom Catalog-17-10-24-v14-0/Lightroom Catalog-17-10-24-v14-0.lrcat
Settings Folder: /Users/stevenlippitt/Library/Application Support/Adobe/Lightroom

Installed Plugins: 
1) AdobeStock
2) Any Tag
3) Calibrite Camera Calibration
4) ColorChecker Camera Calibration
5) DxO PureRAW 5
6) DxO PureRAW 5 Importer
7) Export to Photomatix Pro
8) Iridient Developer
9) jb: CaptureTime to Exif
10) jb: Search+Replace
11) jb: Syncomatic
12) jf Flickr
13) jf Geocoding Support
14) jf Google Drive
15) jf Metadata Viewer
16) jf Metadata Wrangler
17) JPEGmini
18) LR/Enfuse
19) LRT Export 7
20) Negative Lab Pro v3
21) Nik 8 HDR Efex
22) OpenDirectly
23) Plugin Parameters
24) TPG Metadata Panels

Config.lua flags: 

PLEASE REMEDIATE ASAP!

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​@cde1313 It seems like the common issue is the AMD Radeon Pro 5700 XT

...and other AMD Radeon 500 and 5000 series GPUs on Intel Macs:

​@cde1313 I am having this issue now.

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.

I am having this issue now. I have not had problems with this function until yesterday.

Metal: AMD Radeon Pro W5700X

For over a year, LR's AI commands have been tripping over bugs in the graphics drivers for Intel Macs' Radeon 500- and 5000-series GPUs.
 
The drivers in Mac OS 15 appeared to have addressed many of the issues, but there continues to be a steady trickle of reports like yours. It looks like neither Apple nor AMD care much about fixing driver bugs for seven-year-old GPUs on a platform Apple wants to go away.

It would be good to merge these recent reports into a single thread, so that Adobe gets a more accurate view of the issue. Unfortunately, the new forum is still missing three months of recent content, and it’s search function is very poor, so I can’t find these reports.

Aaand the next one, welcome to the club! 🥳

I hope this will get fixed soon …

I’m experiencing the same issue:

La détection de personnes ne fonctionne pas dans le menu masque mais la détection du sujet fonctionne.

Cela ne fonctionne pas non plus avec le module camera raw de PS

J’ai désinstallé et supprimé les préférences de Lightroom. J’ai essayé en désactivant le GPU mais cela ne change rien

Voici les informations système : 

Version Lightroom Classic: 15.2 [ 202602111402-ec4112e8 ]
Licence: Creative Cloud
Paramètre de langue: fr-FR
Système d'exploitation : Mac OS 26
Version : 26.3.0 [25D125]
Architecture de l'application : x64
Nombre de processeurs logiques: 24
Vitesse du processeur : 3,3Ghz
Version SQLite: 3.36.0
Version Adobe GSDK: 1.4.0.171

Mémoire intégrée : 65 536,0 Mo
Mémoire GPU dédiée utilisée par Lightroom: 6 330,5Mo / 16 368,0Mo (38%)
Mémoire réelle disponible pour Lightroom : 65 536,0 Mo
Mémoire réelle utilisée par Lightroom : 5 497,9 Mo (8,3%)
Mémoire virtuelle utilisée par Lightroom : 55 948,3 Mo
Taille de la mémoire cache : 920,9Mo
Version interne de Camera Raw: 18.2 [ 2482 ]
Nombre maximal de liens utilisé par Camera Raw  : 5
Optimisation SIMD de Camera Raw : SSE2,AVX,AVX2
Mémoire virtuelle de Camera Raw: 1286Mo / 32767Mo (3%)
Mémoire réelle de Camera Raw: 1304Mo / 65536Mo (1%)

Cache1: 
Final1- RAM:657,0MB, VRAM:5 374,0MB, Pleiniere26fev2026-077.dng
NT- RAM:657,0MB, VRAM:5 374,0MB, Combined:6 031,0MB

Cache2: 
m:920,9Mo, n:352,3Mo

U-main: 144,0Mo

Taille d’aperçu standard: 2560 pixels
Affichages : 1) 2560x1440, 2) 1200x1920

Informations relatives au processeur graphique : 
Metal: AMD Radeon Pro W5700X
État initial: GPU pour l'exportation pris en charge par défaut
Préférence utilisateur: GPU pour exportation activé
Activer la HDR dans Bibliothèque: Désactiver
Processeur graphique pour la génération d’aperçu :Activé (S5_15)

Dossier de l'application : /Applications/Adobe Lightroom Classic
Chemin d'accès à la bibliothèque : /Volumes/Raid Interne/Lightroom/pro/Lightroom Catalog-principalMai24.lrcat
Dossier des paramètres : /Users/FredericAlbert_1/Library/Application Support/Adobe/Lightroom

Modules installés : 
1) Adobe Stock
2) ColorChecker Camera Calibration
3) Flickr
4) Koken
5) Logi Plugin
6) Loupedeck2
7) Module externe d'importateur Aperture/iPhoto

Marqueurs Config.lua: 

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​@sarrelibre Turning off the graphics processor makes no difference.

Weirdly, LR’s AI commands don’t obey the setting of Preferences > Performance > Use Graphics Processor. On Mac, there’s no way to stop the AI commands from using the GPU.

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​@sarrelibre Metal: AMD Radeon Pro W5700X

Operating system: Mac OS 26

For over a year, LR's AI commands have been tripping over bugs in the graphics drivers for Intel Macs' Radeon 500- and 5000-series GPUs.
 
The drivers in Mac OS 15 appeared to have addressed many of the issues, but there continues to be a steady trickle of reports like yours. It looks like neither Apple nor AMD care much about fixing driver bugs for seven-year-old GPUs on a platform Apple wants to go away.