Lightroom Classic is too slow on Mac

[Matt Rn]

Since I have updated Lightroom Classic it has slow down extremely. 

When I'm adjusting the brightness or any other adjustment on any size photo it takes about 15seconds in average to respond. If I have to zoom in on a photo it will take for ever to enlarge the image. 

It's just not useable. Please is there anyone can help and let me know how to fix this? I am using a Mac.

I appreciate it.

Matt

[Akash Sharma]

Hi Matt,

Sorry that Lightroom Classic is running slow on your computer running macOS.

Which exact version of Lightroom Classic are you using and what is the macOS version? Please check that the app is updated to the latest version as mentioned in this article: https://helpx.adobe.com/lightroom-classic/kb/keeping-lightroom-up-to-date.html

You may try the below mentioned steps to check if that helps with the performance of the application.

1. Go to the Preferences for Lightroom Classic > Performance and uncheck the option to Use Graphic Processor (Select Off from the drop down)
2. Increase the Maximum Size under the Camera Raw Cache Settings from 5GB to 15 or 20GB.
3. Check the option to Use Smart Previews instead of Originals for image editing
4. Uncheck the option to Generate Previews in parallel

5. Go to the General tab under Preferences and check the option to Replace Embedded previews with standard previews during idle time. 

Then quit and relaunch Lightroom Classic and test the application for a while to check if that helps.

Thanks,

Akash

[Matt Rn]

Hi akash,

Thank you, for your responce.

I have the latest updated 9.2.1.

I went with your recomendations and even redownload the Lightroom again and it is better but not like before that use to be faster. before your instructions it would take about 35 seconds to go from one photo to another. Now it takes 5-8 second to go between images. I still think there is something wrong and I can't figure it out. I did happened when I download the update and since been acting slow. 

Please let me know if there is anything else I can do to fix the speed. 

Thank you,

Matt

[Akash Sharma]

Thanks for the update Matt and it's good to know that optimizing the app settings somewhat improved the performance. 

Are you using macOS Catalina? Would you mind checking out the steps mentioned in this article  https://helpx.adobe.com/lightroom-classic/kb/lightroom-basic-troubleshooting-fix-most-issues.html and let us know if that helps? 

~Akash