P: Slow UI when using Mac and Custom Display Profile

with 9.4 the sys runs smoothly with my 32GB. If that is really the case, that the new version needs more than that, then we all have to buy a new M1 mac. I personally find it shocking to consider that they would do such a thing...

Right DYP, I used to have 16GB RAM on an iMac and couldn't have ANY other apps open while running LR, and ran Memory Clean 5 times a day! Now I have 64GB RAM on a 5K iMac and I can read my mail and websites while LRC is still open!

Hard to believe that LR would really be functional with only 8GB of RAM. I had a MP5.1 with 48GB for a while and was always running in memory limitation. With 96GB it is much better.

@ann_chown 

Na, I have 64Gigs of RAM and the speed lag with 4K and custom profiles is there. It is present because the graphic adapter is not requested in library mode at all.

I've been talking to a senior Apple technical support person about this problem today and he has checked the Activity Monitor remotely while I processed an image. I am not a technical person (!) but he said that of the 8.00 GB of memory on my Mac, over 7.00 was being used. Soooo. - does this mean that I will need to buy more RAM in order for LR Classic to function at a speed we are used to? Will that help or not? And is Adobe doing/able to do anything to reduce the amount of RAM being used?

I'm using Big Sur now too.

@Alexander 

That's genius! On an iMac Pro, LR just flies.

Think I'll just keep the setting on forever.

@chico11 obviously it doesn't fix the bug, haha! 🙂 But it's a better workaround for me, because I can keep using my custom monitor profile.

It did make me wonder whether I'm actually affected by THE bug that others are describing. I'm not sure but I would assume that @DYP doesn't appear to be using a Retina/HiDPI display (since he doesn't have the Low Res option for LrC) - and is still affected by it.

@Alexander

For sure it is faster. Lightroom has to calculate with 1/4 of the data asx in 4K. But that does not fix this bug.

Not sure why I can't post a screen shot. 

MP2012 10.14.6 No I do not have that option.