LrC is using my slower GPU and making my macbook unusable.

Ok I think I got it figured out. So I did some command prompts to change which gpu is being used and that worked with LrC using the fast one but the problem came back after a restart and it used my slow one. Then I tried this: First I entered this into terminal sudo pmset -b gpuswitch 2. This sets "Switch between discrete and integrated graphics cards automatically while running on battery power"
Then I think I entered this sudo pmset -a gpuswitch 2. This sets " Automatically switch between discrete and integrated graphics card (this is your laptop's default setting)"
. And then I switched the graphics accelerator fully on within LrC Preferences, then a SMC Reset, and that combination seemed to do the trick. I tried so many different combinations so I can't remember if I did the the second command (sudo pmset -a gpuswitch 2) or not though but currently under system settings graphic switching is set to off but my computer is automatically switching both plugged in and not except for LrC which uses my fast gpu regardless. . Denoise AI still takes 45 seconds but Landscape Mask completes in about 3 to 4 seconds vs over a minute and now I can do other tasks at the same time, like watching a video. So stoked I don't need a new computer!!! This is where I got the prompts for whoever wants to try this if they have this issue. https://nathansnelgrove.com/2020/03/how-to-force-your-macbook-pro-to-use-its-discrete-graphics-card-when-its-plugged-in

I have triple checked and graphics switching is turned off. Plugged in. Restarted. I have tried all combinations within the Performance tab so what you see in the info I paste is the last combo I tried. In that tab it shows my AMD Radeon 5600m as the gpu used. 

Lightroom Classic version: 15.0.1 [ 202511041508-dddee541 ]
License: Creative Cloud
Language setting: en-US
Operating system: Mac OS 15
Version: 15.5.0 [24F74]
Application architecture: x64
Logical processor count: 16
Processor speed: 2.4GHz
SqLite Version: 3.36.0
Adobe GSDK Version: 1.4.0.171

Power Source: Plugged In, 100%
Built-in memory: 65,536.0 MB
Dedicated GPU memory used by Lightroom: 182.7MB / 8,176.0MB (2%)
Real memory available to Lightroom: 65,536.0 MB
Real memory used by Lightroom: 1,738.5 MB (2.6%)
Virtual memory used by Lightroom: 40,255.0 MB
Memory cache size: 26.1MB
Internal Camera Raw version: 18.0 [ 2389 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 510MB / 32767MB (1%)
Camera Raw real memory: 583MB / 65536MB (0%)

Cache1:
Final1- RAM:473.0MB, VRAM:0.0MB, DSC01524.ARW
NT- RAM:473.0MB, VRAM:0.0MB, Combined:473.0MB

Cache2:
m:26.1MB, n:410.0MB

U-main: 85.0MB

Standard Preview Size: 2880 pixels
Displays: 1) 3584x2240

Graphics Processor Info:
Metal: AMD Radeon Pro 5600M
Init State: GPU for Export supported by default
User Preference: GPU for Display disabled
Enable HDR in Library: OFF
GPU for Preview Generation: Off (S5_7)

Application folder: /Applications/Adobe Lightroom Classic
Library Path: /Users/beacon/Pictures/LightRoom Catalog/LightRoom Catalog.lrcat
Settings Folder: /Users/beacon/Library/Application Support/Adobe/Lightroom

Installed Plugins:
1) AdobeStock
2) Aperture/iPhoto Importer Plug-in
3) DxO PureRAW 5
4) DxO PureRAW 5 Importer
5) Flickr

Config.lua flags:

Some diagnostic steps:

1. Triple-check that Automatic Graphics Switching is indeed off:

https://support.apple.com/en-in/102265

2. Make sure computer is plugged in and not running on battery.

3. Restart the computer.

4. 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.