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P: People Masking fails on Mac (Intel)

Forum|Forum|2 months ago
February 27, 2026
73 replies
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Since the latest versions of Lightroom Classic and MacOS the masking of people always shows “No people found” – even on photos where it was working before.

Lightroom Classic version: 15.2 [ 202602111402-ec4112e8 ]
License: Creative Cloud
Language setting: en-DE
Operating system: Mac OS 26
Version: 26.3.0 [25D125]
Application architecture: x64
Logical processor count: 24
Processor speed: 3,3GHz
SqLite Version: 3.36.0
Adobe GSDK Version: 1.4.0.171

Built-in memory: 196.608,0 MB
Dedicated GPU memory used by Lightroom: 4.743,3MB / 16.368,0MB (28%)
Real memory available to Lightroom: 196.608,0 MB
Real memory used by Lightroom: 3.040,3 MB (1,5%)
Virtual memory used by Lightroom: 55.303,7 MB
Memory cache size: 62,7MB
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: 631MB / 98303MB (0%)
Camera Raw real memory: 644MB / 196608MB (0%)

Cache1:
Final1- RAM:519,0MB, VRAM:1.818,0MB, ALP05331.ARW
NT- RAM:519,0MB, VRAM:1.818,0MB, Combined:2.337,0MB

Cache2:
m:62,7MB, n:253,8MB

U-main: 129,0MB

Standard Preview Size: 6016 pixels
Displays: 1) 6016x3384

Graphics Processor Info:
Metal: AMD Radeon Pro W5700X
Init State: GPU for Export supported by default
User Preference: Auto
Enable HDR in Library: OFF
GPU for Preview Generation: Off (S5_15)

Application folder: /Applications/Adobe Lightroom Classic
Library Path: /Volumes/Sonnet m2/Lightroom/Lightroom Catalog-v13-3.lrcat
Settings Folder: /Users/zippo/Library/Application Support/Adobe/Lightroom

Installed Plugins:
1) Publisher, By The Turning Gate

Config.lua flags:

Correct answer johnrellis

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@sirthrosturv, @Hot Tubs Oxfordshire, there are many reports that People masking fails on Intel Macs with Mac OS 26.3, and the evidence strongly points at a buggy AMD graphics driver released in 26.3:

While waiting for Apple and AMD to release a fixed driver, try this workaround:

@Hot Tubs Oxfordshire I intalled Mac OS Sequoia on an external drive (since it appears impossible to downgrade Tahoe) and people detection is no an issue when runnig Lightroom under that OS on the iMac.

That’s further evidence it’s a bug in the Mac OS 26.3 AMD graphics driver.

Show previous replies

AK_77

Participating Frequently

Sorry I can’t help, but I have the EXACT SAME problem!

And it annoys the heck out of me.

I suspect it might be related to the new assisted selection. I never activated it, but apparently it was running in the background by default.

nikunj.m

Legend

Hi, we’re sorry that you’re experiencing the same behavior!

Please go to the Help menu in Lightroom Classic, then System Info, and copy the text. You can share the info with us by either pasting it as a reply here or in a text file and sharing the file with us.

Thanks,

Nikunj

AK_77

Participating Frequently

Sure, no problem:

Lightroom Classic-Version: 15.2 [ 202602111402-ec4112e8 ]
Lizenz: Creative Cloud
Spracheinstellung: de-DE
Betriebssystem: Mac OS 26
Version: 26.3.0 [25D125]
Anwendungsarchitektur: x64
Anzahl logischer Prozessoren: 16
Prozessorgeschwindigkeit: 3,8GHz
SQLite-Version: 3.36.0
Adobe GSDK-Version: 1.4.0.171

Integrierter Speicher: 32.768,0 MB
Dedizierter GPU-Speicher, der von Lightroom verwendet wird: 747,1MB / 8.176,0MB (9%)
Für Lightroom verfügbarer phys. Speicher: 32.768,0 MB
Von Lightroom verwendeter phys. Speicher: 4.938,7 MB (15,0%)
Von Lightroom verwendeter virtueller Speicher: 49.205,8 MB
Cache-Speichergröße: 292,9MB
Interne Camera Raw-Version: 18.2 [ 2482 ]
Maximale Anzahl Threads, die Camera Raw verwendet: 5
Camera Raw SIMD-Optimierung: SSE2,AVX,AVX2
Virtueller Speicher in Camera Raw: 98MB / 16383MB (0%)
Physischer Speicher in Camera Raw: 100MB / 32768MB (0%)

Cache1:
NT- RAM:0,0MB, VRAM:0,0MB, Combined:0,0MB

Cache2:
m:292,9MB, n:0,0MB

U-main: 87,0MB

Standardvorschaugröße: 5120 Pixel
Monitore/Anzeigegeräte: 1) 5120x2880, 2) 1920x1200

Informationen zum Grafikprozessor:
Metal: AMD Radeon Pro 5500 XT
Anfangsstatus: GPU zum Exportieren wird standardmäßig unterstützt
Benutzerpräferenz: Automatisch
HDR in Bibliothek aktivieren: AUS
GPU zur Vorschauerstellung: Auto (S5_7)

Anwendungsordner: /Applications/Adobe Lightroom Classic
Bibliothekspfad: /Users/andre/Pictures/Lightroom/Standard/Lightroom Catalog v13.lrcat
Einstellungen-Ordner: /Users/andre/Library/Application Support/Adobe/Lightroom

Installierte Zusatzmodule:
1) AdobeStock
2) Aperture/iPhoto-Import-Zusatzmodul
3) Flickr

Config.lua-Flags:

nikunj.m

Legend

Hi, thanks for reaching out!

You can try going to the Preferences for Lightroom Classic, then Performance, and disable the option to Use Graphics Process. Once done, relaunch Lightroom Classic to check if that makes a difference.

Thanks,

Nikunj

S

sarrelibreAuthor

Participant

Turning off the graphics processor makes no difference.
However, I discovered something interesting: when I apply an adaptive preset to the photo, the people selection (including hair, clothes, eyes, etc.) works perfectly, regardless of whether the graphics processor is enabled or disabled.

S

sarrelibreAuthor

Participant

Since the latest versions of Lightroom Classic and MacOS the masking of people always shows “No people found” – even on photos where it was working before.

Lightroom Classic version: 15.2 [ 202602111402-ec4112e8 ]
License: Creative Cloud
Language setting: en-DE
Operating system: Mac OS 26
Version: 26.3.0 [25D125]
Application architecture: x64
Logical processor count: 24
Processor speed: 3,3GHz
SqLite Version: 3.36.0
Adobe GSDK Version: 1.4.0.171

Built-in memory: 196.608,0 MB
Dedicated GPU memory used by Lightroom: 4.743,3MB / 16.368,0MB (28%)
Real memory available to Lightroom: 196.608,0 MB
Real memory used by Lightroom: 3.040,3 MB (1,5%)
Virtual memory used by Lightroom: 55.303,7 MB
Memory cache size: 62,7MB
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: 631MB / 98303MB (0%)
Camera Raw real memory: 644MB / 196608MB (0%)

Cache1:
Final1- RAM:519,0MB, VRAM:1.818,0MB, ALP05331.ARW
NT- RAM:519,0MB, VRAM:1.818,0MB, Combined:2.337,0MB

Cache2:
m:62,7MB, n:253,8MB

U-main: 129,0MB

Standard Preview Size: 6016 pixels
Displays: 1) 6016x3384

Graphics Processor Info:
Metal: AMD Radeon Pro W5700X
Init State: GPU for Export supported by default
User Preference: Auto
Enable HDR in Library: OFF
GPU for Preview Generation: Off (S5_15)

Application folder: /Applications/Adobe Lightroom Classic
Library Path: /Volumes/Sonnet m2/Lightroom/Lightroom Catalog-v13-3.lrcat
Settings Folder: /Users/zippo/Library/Application Support/Adobe/Lightroom

Installed Plugins:
1) Publisher, By The Turning Gate

Config.lua flags:

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