P: Slow UI when using Mac and Custom Display Profile

As others are suggesting here, I changed from my colour managed profiles on my dual screen setup to the 'Generic RGB Profile', it 'solved' the issue of slow library. Hopefully a fix is coming soon as it does seem a lot of people are getting same diagnosis.

@bill_3305731 

System with no problems on MacOS with Lightroom V10

My son has a 16" MacBook Pro (i9, 32GB RAM, Apple supplied internal 2TB SSD) with multiple catalogs (images going back 10 years) that have been updated to V10 and he has none of the problems with V10 on MacOS that have been reported on this forum, he's tried to recreate all of them without success. 

• most of his images are Canon APSC DSLR, Fuji X-T3 and a couple of iPhones
• a wide mixture of RAW and JPEG images including a few TIFFs 
• using a Dell P2715Q 4K monitor 
• no plug-ins
• no added presets 
• standard sRGB profile 
• all Lightroom components on the internal 2TB SSD 
• no catalog corruption 
• no crashes 
• no slowdowns 

I am also having hugely frustrating issues of lag on my iMac 2015 (late) using Lightroom ever since updating to v10. I also recently updated to Big Sur (not a wise choice I must admit in retrospect, but done it now). I see this issue has been going on for a while now from the length of this thread. Is there any hope on the horizon? I may look into downgrading to previous version. Very disappointed with Adobe over this.... have even considering media upgrading my ram to cope but hoping it will be resolved by Adobe before suffering the cost. Thanks. 

Posting to follow.

Same problem with 2019 Mac Pro and dual Apple displays.

Mike

It is strange. in my Mac Pro I had a disk with OS catalina - there was no problem. Yesterday I bought a new disk, inserted it into a Mac and installed Big Sur - since then the problem has occurred.

*fotimelasku It's not Big Sur but a bug with some Macs, display profiles and perhaps display resolution.

Hello.

On the new big sur system I have a problem with scrolling and browsing photos.

When I browse photos in the library, it's slow.
Editing scrolling (basic, tone curvem, color, color grading) is slow. When I pull the scroll bar, it's fast. When I scroll, it's slow.

Is there a known issue with LR 10.0 and Big Sur?

My entire computer freezes when working in the development module and I have to force shutdown and reboot my system. The freeze does not prompt a crash report from Adobe but occasionally does from Apple after the reboot.

I have two Macs, one a MBP and another a Mac mini, both have vanilla installs of LR 10.0 with no additional plugins or presets. Both systems are exhibiting the exact same problem.