Lightroom Classic maxing out my m2 MacBook Pro's CPU & RAM while editing a single image.

[Danfc4]

It’s a 13” M2 MacBook Pro with 24 GB of RAM, and the files are from a Fuji GFX100s. I have always used Lightroom Classic and never had a problem unless I was editing a lot of photos without restarting Lightroom, which would solve the problem (the problem being running out of RAM). Recently, it seems to be using way more hardware than it ever did before. The CPU usage hovers around 70% and the RAM usage is over 100% while I am idling in the development window, and when I try to do anything, the CPU jumps to 100%, and everything freezes up until the CPU usage drops back down. This is all while only having one file in my catalog.

I took the same file and edited it in Lightroom CC, and the CPU usage never got over 35% and hovered around 17%, and the RAM never went over 21 GB used. Nothing was laggy, and it worked fine. I also edited the same file in Capture One 23, and it used even less hardware.

I prefer to use Lightroom Classic for most of my work, but as of late, it’s been straight up unusable. Has there been an update or something that would have caused the poor performance lately, or is there something I can do to make it better?

[GoldingD]

Can you share some info?

/Catalog setting/General/

• Where is your catalog located?
• And if you bring up Finder, how much free space in percent does that hard drive have? Looking for at least 20%, some say 25%

Standard Preview Size? And does that match your monitor?

• Are you automatically writing changes to XMP? And in MACOS their may be an issue even if that is off
• Address Lookup on? (hm, oh bother, why is mine on)
• Face Detection on in catalog settings?

• If you had Windows, the GPU driver would be of interest, As yo gave a MAC, that is a bit more complicated. It is dependant upon MACOS version (update). So more importantly is what MACOS version do you have.
• Camera RAW CACHE Setting, limit, and where placed?

And yes, what MACOS? Including version number.

And the exact LrC version number?

[Danfc4]

macOS Sonoma 14.2

lightroom classic 13.1

1T SSD 18.38% used

catalog located /Users/mymacbook/Pictures/Lightroom

Automatically write changes into XMP is off

Address lookup is on

Face detection is off

Camera RAW CACHE I set to 20GB and is located /Users/mymacbook/Library/Caches/Adobe Camera Raw 2

Thanks for the help

[GoldingD]

macOS Sonoma 14.2

see: https://community.adobe.com/t5/lightroom-classic-discussions/alert-if-you-updated-to-sonoma-14-2-ple...

[GoldingD]

• As you have selected custom, you are allowed a few options to check or unchecked. Both are unchecked, hence Limited Acceleration
• What happens if you turn USe GPU for image processing, on?
• And then you might as well check Use GPU for Export.

[Danfc4]

it doesn’t allow me to select those options, they are grayed out and nothing happens when I click on them.

it was originally on auto for use graphics processor and I changed it to see if it would help at all. no combination of settings I can enable for graphics processing makes it any better. 

My system is allowing me to update to Sonoma 14.3 I will update it now and see if it helps at all, ill come back and post an update with the results.

Thanks

[GoldingD · Accepted solution]

"

it doesn’t allow me to select those options, they are grayed out and nothing happens when I click on them.

it was originally on auto for use graphics processor and I changed it to see if it would help at all. no combination of settings I can enable for graphics processing makes it any better."

also see:

• https://community.adobe.com/t5/lightroom-classic-discussions/lightroom-classic-only-supporting-limit...
• https://community.adobe.com/t5/lightroom-classic-discussions/use-gpu-for-image-processing-is-greyed-...

[Danfc4]

It seems to be working now. I don't know exactly what did it, I updated to Sonoma 14.3 and deleted the Camera Raw GPU Config.txt file and then checked the boxes for Use GPU for image processing & Use GPU for Export before I tested it but it seems to be back to normal now.

Thanks for the help!

[John R Ellis]

[This post contains formatting and embedded images that don't appear in email. View the post in your Web browser.]

LR sometimes loses its brains and overwrites the config file recording the capabilities of the graphics processor. The M2 can of course support full acceleration.

Force LR to reevaluate the GPU's capabilities by deleting the "Camera Raw GPU Config.txt" file:

https://helpx.adobe.com/lightroom-classic/kb/troubleshoot-gpu.html#solution-3

[Gerzson Réti]

Same problem here on my 16" M2 Max Macbook Pro 64GB...I have never ever had this problem on my previous mac's.....

[Ian Lyons]

Please post a copy of your 'System Info' . This can be obtained from the LrC Help > System Info menu item. A screenshot of the Activity Monitor memory tab would also be help. This should be captured when you're experiencing the memory issue.