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Moderators, ​@Rikk Flohr_Photography, this is a duplicate post with:

​@AK_77, building on Johan’s reply, 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.

Here are some of the threads discussing issues with the 500- and 5000-series GPUs on Intel Macs:

https://community.adobe.com/questio...md-only-affects-cr-lrc-lrd-981379/index3.html
https://community.adobe.com/questions-675/lightroom-classic-v14-5-1-hangs-up-983739
https://community.adobe.com/questio...wer-gpu-and-making-my-macbook-unusable-984147
https://community.adobe.com/questions-675/lightroom-export-running-slowly-983147
https://community.adobe.com/questio...dunst-entfernen-erzeugt-schwarzes-bild-981202

Since the update to 15.2, no people are found in images anymore.

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: 318,3MB / 8.176,0MB (3%)
Für Lightroom verfügbarer phys. Speicher: 32.768,0 MB
Von Lightroom verwendeter phys. Speicher: 3.551,2 MB (10,8%)
Von Lightroom verwendeter virtueller Speicher: 47.177,7 MB
Cache-Speichergröße: 1.241,5MB
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: 204MB / 16383MB (1%)
Physischer Speicher in Camera Raw: 206MB / 32768MB (0%)

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

Cache2: 
m:1.241,5MB, n:0,0MB

U-main: 209,0MB

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: 

Tell us what hardware you use and what OS. If you use Windows: Problems like this are almost always caused by outdated GPU drivers. 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.