Lightroom CC: Slow performance and scrolling - iMac 2017

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  • Updated 4 weeks ago
  • (Edited)
Hello there.

I have a 2017 i7 4.2Ghz iMac with 24GB ram and the 580 Pro 8GB graphics card, and the performance of the new Lightroom CC is at certain points very very bad. 

Scrolling through the photos is an pain, its very slow and choppy, and if I scroll a bit faster, the program gets hang on the scrolling direction I was scrolling for some seconds. If I reduce the window size, the scroll gets smother (not perfect). Which makes me think that the program is not optimized, at all, to retina displays. Any album with more than 30 photos and I'm spending more time scrolling than editing. And going to the "all photos" tab is not an option.

Anyone experiencing this? Any temporary fix? I notice that if I change the grid view, it gets a bit better, but not by much.

Plus, some edits, like the brush edits, are also very slow to take effect. When I'm painting with the brush it lags a lot behind my current cursor position. 
It's a bit disappointing because, despite not being 100% smooth, I have a better performance on lots of Lightroom functions on my almost 7 years old MacBook Pro without a Retina display.
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Nuno

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Posted 5 months ago

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Joeri Kemp

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I have the exact same problem. LR Classic works just fine on my macbook (albeit mine has a retina display), but on my brand new Imac it is just unbearable.
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prudhommea

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I am also experience this issue. Purchased a new iMac to use with Lightroom and am seeing significantly better performance on my 5 year old MacBook Air....
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Amado Corominas

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Only as a test, try to disable graphics card acceleration. If LR goes faster, you will know that the issue is GPU related at least. It happens on some GPUs (don't know why though)
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Joeri Kemp

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I actually managed to find the problem. It's LR itself. Lightroom apparently cannot handle the 5k screen well. Change your display to scaled (largest possible) and make sure your thumbnails in LR are quite big. Watch the magic happen. I'm getting a way better performance this way. Good luck!
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Ben Fletcher

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Joeri! Bravo!!!!  This work around worked wonders for me on my 5K iMac!! This is fantastic. 
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Ryan DeMont

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Are they going to make a fix for this so Imac owners don't have to change their screens? These are expensive computers that speaknig for myself, I got with lightroom and photoshop in mind. I'm having the same problem as everyone above and it's March 7. Clearly there's no rush. 
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Monty

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For a while I was using a maxed out 13” MacBook Pro. I too noticed scrolling in grid view to be a bit choppy. Not bad, but not as smooth as I’d hope.

I switched to a 10.5” iPad Pro. LRCC screams on it. Scrolling is VERY fast and smooth. Much faster than the MBP

Monty
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sjm88

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Is there any update on this? It seems absolutely crazy that my maxed out dGPU MacBook Pro cannot scroll through photos, and my iPad can do it just fine. Has any optimisation been done at all?