Lightroom Classic Taking up too much CPU so my computer crashes

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  • Updated 2 months ago
Lightroom Classic CHOKES whenever I import, export, synchronize...and edit. It takes up so much of my CPU that my computer crashes. What is wrong?
I'm using macOS High Sierra, iMac (Retina 5K, 27-inch, Late 2015), 4 GHz Intel Core i7, 32 GB 1867 MHz DDR3, AMD Radeon R9 M395X 4096 MB.
Why is Lightroom taking up so much of my CPU?
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Kimberly Teske Fetrow

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  • SUPER FRUSTRATED.

Posted 2 months ago

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Jeremy Tilford

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Same problems on my late 2017 iMac. If I leave LR open overnight it is unusable the next day. Using all CPU resources and chewing up memory. Constant revolving beach ball.I have to restart LR and it gradually becomes more resource hungry during the session. Import fine on Nikon RAW files but slow with Leica Q dngs.
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Daniel Maricic

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I have a similar problem but only with exporting.  the reason is that Lr is not using my 1080 Ti GPU for some reason.
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David Converse

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Using CPU (even all cores at 100%) won't cause your computer to crash, although it could get very slow and seem unresponsive. A memory leak could eventually do it but with 32GB of RAM that seems unlikely too.
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Rikk Flohr, Official Rep

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Kimberly, I am sorry you are having trouble. 

Describe exactly what you mean by 'crashing' please. Do you get a crash report? If so is it Apple's or Adobe's crash reporter? Do you submit the crash reports? I would like to see if I can track one down and review it. 
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Kimberly Teske Fetrow

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Hi Rikk - I always submit the crash report. Usually I have to "force quit" and restart. Yesterday I actually got a report from Apple saying that my computer nearly shut down because Lightroom was using too much of my memory and my computer couldn't continue to run.

Basically, when performing one of the actions I mentioned, Lightroom becomes completely unuseable for HOURS unless I force quit. It I want to export or import images I have to do it and then just walk away or be prepared to just sit and watch the ball spin. Something is NOT right.
Kim
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Rikk Flohr, Official Rep

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To locate your crash reports, I would need to have your Adobe ID. Is it the same as the email you've registered with this forum? If not, let me know and I will contact you offline. 

Two steps:

Bad performance can be tied to a bad install.
1. Backup your Lightroom Catalog
2. Use the Creative Cloud App to uninstall Lightroom from your Mac. 
3. Restart your computer
4. Without opening any other programs go straight to the Creative Cloud App and reinstall Lightroom.
5. Reset Preferences. A Preference File will survive a Lightroom uninstall/reinstall. Sometimes weird behavior is corrected/cured by resetting the preferences. 

Reset Procedure:

1. Close Lightroom.
2. Hold down [Alt/Opt]+[Shift] while restarting Lightroom. 
3. Overwrite the Preferences when prompted by the dialog.
4. Close Lightroom.
5. Restart Lightroom.
6. Test your import and export. 

Does the crashing behavior/speed issue continue after resetting the preferences?
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Kimberly Teske Fetrow

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Yes. My username is the same as the email. I'll try this.
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Kimberly Teske Fetrow

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I did all that and it still isn't working right. The number counts after I export never really do catch up until I force it to synchronize folders. I only exported 20 photos and it just choked when I tried to keep editing while that was going on. Then it finished exporting and it is still just choking.
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Rikk Flohr, Official Rep

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It would be helpful if you could screenshot your Export dialog so we can see exactly what you are attempting.  Is that possible?