P: Scroll speed on iMac Pro incredible slow

Wow, it works, that's kinda bitter sweet. Sigh... thanks.

See my post above: https://feedback.photoshop.com/photoshop_family/topics/scroll-speed-on-imac-pro-incredible-slow?topi...

The best workaround I found is this one:

1. Open Finder
2. Navigate to Adobe Photoshop CC 2019 in your Applications folder
3. Rightclick the application, click on "Get Info"
4. Activate "Open in Low Resolution"

Now you can at least use Adobe Software that still cannot handle applications in high resolution.

Similar issues here I am afraid... I now have 20GB RAM installed. 1TB fusion SSD + NVMe, 4GB GFX. Scrolling is laggy. Only LR behaves like this. No other app on the machine.

MacOS supports high precision scrolling, please add compatibility to Lightroom. 

Right now scrolling is choppy - the content jumps about 5 or 6 pixels at a time. It's distracting and makes the product more difficult to work with.

Users have been asking for this for years, Could we at least get an explanation from Adobe as to why they are choosing not to implement this very basic feature???

I have a big issue with new Osx MOJAVE and Lightroom CC ver. 2.0 on a Macpro with ssd/32gb/6 core + Dell 4k 32 inch. and double graphic card AMD FirePro D300 2gb ram. The scrolling gallery is very very slow at all screen resolution, isn’t possible to work fine. Does anyone have the same problem? No problem before upgrade to Mojave with the same system/Lightroom version. I tryed to uninstall/reinstall Lr with two reboot but the problem isn't solved. I'm very disappointed, it's crazy that with my old Macbook the speed is ok and with an expensive/professional system it's impossible to work.

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.

The all new Lightroom CC fulfills my wildest dreams about what i wanted lightroom to be.
But: I own a Top Line Macbook 2016 15" System with Radeon Graphics and 2,9 GHz Quad Core CPU, but scrolling is not smooth. When putting Lightroom CC on a secondary 5K sceen it is not even close to smooth, when scrolling with the magic mouse top and down a few times, the result is that i can sit back and watch the next 15 seconds for the programm to execute the scrolling operations, and this in an album containing just 200 photos. In Apple Photos scrolling in the same constellation is like butter. This is really a huge dissapointment and blocks me from using this software, since... what I want to do with it is as well: browsing my photos...
But the direction the product is going is really promising.

Any update? 

I have the same issue. Have for a while. Running an iMac Pro with 128GB RAM running a 4TB SSD + RAID10 on thunderbolt 3 array. I have 336,000 photos in my Lightroom CC library and it is so agonizingly slow to browse from photo to photo.

I don't want to wait any longer - what is the best alternative? I like the cloud based approach. Should I just choose ON1 or CaptureOne and just use a cloud service to sync, access via mobile? Possibly triage through a third party app and then just import select photos into Apple Photos and use iCloud?

What is the best alternative that can handle this size catalog (336,000 photos)?