After updating to the latest version of Lightroom Classic, the masking tool no longer recognizes people.

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​@NasloVeliz Operating system: Mac OS 26
Version: 26.6.2 [25G83]
Application architecture: x64
Metal: AMD Radeon Pro 5500 XT

Apple and AMD released a buggy graphics driver for the AMD 500- and 5000-series GPUs on Intel Macs in Mac OS 26.3, and many people have reported similar symptoms with People masks and other AI commands:

https://community.adobe.com/questions-675/p-people-masking-fails-on-mac-intel-1551766/index3.html

The only known workaround is to roll back to Mac OS 26.2, which is tedious:

https://community.adobe.com/questions-675/p-people-masking-fails-on-mac-intel-1551766?postid=7687932#post7687932

Given that Mac OS 27 doesn’t support Intel Macs and that AMD stopped selling GPUs to Apple in 2020, I think it’s unlikely that Apple and AMD will release a fixed driver.

my LR Info:

Versión de Lightroom Classic: 15.6 [ 202609251514-f839cde9 ]
Licencia: Creative Cloud
Configuración de idioma: es-419
Sistema operativo: Mac OS 26
Versión: 26.6.2 [25G83]
Arquitectura de la aplicación: x64
Cantidad de procesadores lógicos: 20
Velocidad del procesador: 3,6GHz
Versión de SqLite: 3.45.1
Versión de Adobe GSDK: 1.4.0.213

Memoria incorporada: 65.536,0 MB
Memoria de GPU dedicada que utiliza Lightroom: 3.498,9MB / 8.176,0MB (42%)
Memoria real disponible para Lightroom: 65.536,0 MB
Memoria real usada por Lightroom: 5.268,3 MB (8,0%)
Memoria virtual usada por Lightroom: 52.340,0 MB
Tamaño de memoria de caché: 123,3MB
Versión interna de Camera Raw: 18.7 [ 2743 ]
Número máximo de subprocesos que usa Camera Raw: 5
Optimización de SIMD de Raw de cámara: SSE2,AVX,AVX2
Memoria virtual de Camera Raw: 1295MB / 32767MB (3%)
Memoria real de Camera Raw: 1449MB / 65536MB (2%)

Cache1: 
Final1- RAM:811,0MB, VRAM:1.543,0MB, _NVC1297.ARW
NT- RAM:811,0MB, VRAM:1.543,0MB, Combined:2.354,0MB

Cache2: 
m:123,3MB, n:270,5MB

U-main: 108,0MB

Tamaño de previsualización estándar: 5120 píxeles
Pantallas: 1) 5120x2880

Información de procesador gráfico: 
Metal: AMD Radeon Pro 5500 XT
Estado inicial: GPU para la exportación compatible de forma predeterminada
Preferencia del usuario: Automático 
Activar HDR en la Biblioteca: DESACTIVADO
GPU para la generación de vistas previas:Automático (S5_7)

Carpeta de la aplicación: /Applications/Adobe Lightroom Classic
Ruta de la biblioteca: /Users/naslovelizcampos/Pictures/Lightroom Catalogo/Lightroom Catalogo-v13-3.lrcat
Carpeta de ajustes: /Users/naslovelizcampos/Library/Application Support/Adobe/Lightroom

Plugins instalados: 
1) Adobe Stock
2) Flickr
3) Plugin importador de Aperture/iPhoto

Indicadores config.lua: 

I have the same problem. LRc 15.6 Mac OSx 26.6.2 M4 chip. 
 

Marty

Are you on an Intel Mac?  If not, please do the LR menu command Help > System Info, click the Copy button in the upper right corner, and paste into your reply here, so we can see exactly which versions of hardware and software LR thinks you're running and important LR options that are set.