Lightroom CC abysmal performance on 2017 iMac

Community Beginner ,
Oct 07, 2018 Oct 07, 2018

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One of the things I loved about Apple's Aperture (and all of Apple's photo solutions) was how effortlessly they handled large photo libraries. Performance was always smooth, even with large numbers of RAWs, even on consumer models like the earlier iMacs.

Lightroom CC, which I guess Apple recommends as a replacement for the unfortunately discontinued Aperture, doesn't perform well at all. Editing a single image works well enough, but scrolling through my library in grid view is horribly slow.

Most interface actions outside of Detail View take at least a second, or several seconds, to feedback on the screen. Even switching to Lightroom from another app takes seconds to respond. No other apps I use seem to have this problem, even other pro apps like Logic Pro, Pixelmator, Adobe's own Photoshop... they all have great performance on my iMac.

My question is, is this something I can fix with a particular setting? (There actually aren't many settings available in Lightroom...) Or is this just a faulty app in general? Can I fix it by deleting preferences or any such thing?

So far, I've tried reinstalling Lightroom. I also tried migrating to the latest version of Lightroom Classic with local storage. The interface performance improves a little, but scrolling and everything else is not much improved. I've tried increasing my local photo cache space. No change.

I've tried force-building Smart Previews and storing them locally. No change. I also bought more RAM for the Mac. No change.

I would really appreciate some help here. Also, it's rather confusing to find anything on these forum pages, if you aren't a regular user.

Thanks.

Here is a printout of my System Info:

Lightroom CC version: 1.5 [ 20180807-1548-54800d7 ] (Aug  8 2018)

Operating system: Mac OS 10

OS Version: 10.14 [0]

Application architecture: x64

Logical processor count: 4

Processor speed: 3,4 GHz

Built-in memory: 24.576,0 MB

Real memory available to Lightroom CC: 24.576,0 MB

Real memory used by Lightroom CC: 6.644,9 MB (27,0%)

Virtual memory used by Lightroom CC: 9.139,5 MB

Memory cache size: 5.865,8 MB

Internal Camera Raw revision: 1001

Maximum thread count used by Camera Raw: 3

Camera Raw SIMD optimization: SSE2,AVX,AVX2

Camera Raw virtual memory: 3748MB / 12287MB (30%)

Camera Raw real memory: 3751MB / 24576MB (15%)

Displays: 1) 5120x2880, 2) 1920x1200

Graphics Processor Info:

Metal: AMD Radeon Pro 570

Application folder: /Applications/Adobe Lightroom CC

Settings Folder: /Users/**USERNAME**/Library/Application Support/Adobe/Lightroom CC

AudioDeviceIOBlockSize: 512

AudioDeviceName: Built-in Output

AudioDeviceNumberOfChannels: 2

AudioDeviceSampleRate: 44100

Build: 10.0x7

CoreImage: true

GL_ACCUM_ALPHA_BITS: 0

GL_ACCUM_BLUE_BITS: 0

GL_ACCUM_GREEN_BITS: 0

GL_ACCUM_RED_BITS: 0

GL_ALPHA_BITS: 8

GL_BLUE_BITS: 8

GL_DEPTH_BITS: 24

GL_GREEN_BITS: 8

GL_MAX_3D_TEXTURE_SIZE: 16384

GL_MAX_TEXTURE_SIZE: 16384

GL_MAX_TEXTURE_UNITS: 8

GL_MAX_VIEWPORT_DIMS: 16384,16384

GL_RED_BITS: 8

GL_RENDERER: AMD Radeon Pro 570 OpenGL Engine

GL_SHADING_LANGUAGE_VERSION: 1.20

GL_STENCIL_BITS: 8

GL_VENDOR: ATI Technologies Inc.

GL_VERSION: 2.1 ATI-2.0.36

OGLEnabled: true

GL_EXTENSIONS: GL_ARB_color_buffer_float GL_ARB_depth_buffer_float GL_ARB_depth_clamp GL_ARB_depth_texture GL_ARB_draw_buffers GL_ARB_draw_elements_base_vertex GL_ARB_draw_instanced GL_ARB_fragment_program GL_ARB_fragment_program_shadow GL_ARB_fragment_shader GL_ARB_framebuffer_object GL_ARB_framebuffer_sRGB GL_ARB_half_float_pixel GL_ARB_half_float_vertex GL_ARB_imaging GL_ARB_instanced_arrays GL_ARB_multisample GL_ARB_multitexture GL_ARB_occlusion_query GL_ARB_pixel_buffer_object GL_ARB_point_parameters GL_ARB_point_sprite GL_ARB_provoking_vertex GL_ARB_seamless_cube_map GL_ARB_shader_objects GL_ARB_shader_texture_lod GL_ARB_shading_language_100 GL_ARB_shadow GL_ARB_shadow_ambient GL_ARB_sync GL_ARB_texture_border_clamp GL_ARB_texture_compression GL_ARB_texture_compression_rgtc GL_ARB_texture_cube_map GL_ARB_texture_env_add GL_ARB_texture_env_combine GL_ARB_texture_env_crossbar GL_ARB_texture_env_dot3 GL_ARB_texture_float GL_ARB_texture_mirrored_repeat GL_ARB_texture_non_power_of_two GL_ARB_texture_rectangle GL_ARB_texture_rg GL_ARB_transpose_matrix GL_ARB_vertex_array_bgra GL_ARB_vertex_blend GL_ARB_vertex_buffer_object GL_ARB_vertex_program GL_ARB_vertex_shader GL_ARB_window_pos GL_EXT_abgr GL_EXT_bgra GL_EXT_bindable_uniform GL_EXT_blend_color GL_EXT_blend_equation_separate GL_EXT_blend_func_separate GL_EXT_blend_minmax GL_EXT_blend_subtract GL_EXT_clip_volume_hint GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_depth_bounds_test GL_EXT_draw_buffers2 GL_EXT_draw_range_elements GL_EXT_fog_coord GL_EXT_framebuffer_blit GL_EXT_framebuffer_multisample GL_EXT_framebuffer_object GL_EXT_framebuffer_sRGB GL_EXT_geometry_shader4 GL_EXT_gpu_program_parameters GL_EXT_gpu_shader4 GL_EXT_multi_draw_arrays GL_EXT_packed_depth_stencil GL_EXT_packed_float GL_EXT_provoking_vertex GL_EXT_rescale_normal GL_EXT_secondary_color GL_EXT_separate_specular_color GL_EXT_shadow_funcs GL_EXT_stencil_two_side GL_EXT_stencil_wrap GL_EXT_texture_array GL_EXT_texture_compression_dxt1 GL_EXT_texture_compression_s3tc GL_EXT_texture_env_add GL_EXT_texture_filter_anisotropic GL_EXT_texture_integer GL_EXT_texture_lod_bias GL_EXT_texture_mirror_clamp GL_EXT_texture_rectangle GL_EXT_texture_shared_exponent GL_EXT_texture_sRGB GL_EXT_texture_sRGB_decode GL_EXT_timer_query GL_EXT_transform_feedback GL_EXT_vertex_array_bgra GL_APPLE_aux_depth_stencil GL_APPLE_client_storage GL_APPLE_element_array GL_APPLE_fence GL_APPLE_float_pixels GL_APPLE_flush_buffer_range GL_APPLE_flush_render GL_APPLE_object_purgeable GL_APPLE_packed_pixels GL_APPLE_pixel_buffer GL_APPLE_rgb_422 GL_APPLE_row_bytes GL_APPLE_specular_vector GL_APPLE_texture_range GL_APPLE_transform_hint GL_APPLE_vertex_array_object GL_APPLE_vertex_array_range GL_APPLE_vertex_point_size GL_APPLE_vertex_program_evaluators GL_APPLE_ycbcr_422 GL_ATI_blend_equation_separate GL_ATI_blend_weighted_minmax GL_ATI_separate_stencil GL_ATI_texture_compression_3dc GL_ATI_texture_env_combine3 GL_ATI_texture_float GL_ATI_texture_mirror_once GL_IBM_rasterpos_clip GL_NV_blend_square GL_NV_conditional_render GL_NV_depth_clamp GL_NV_fog_distance GL_NV_light_max_exponent GL_NV_texgen_reflection GL_NV_texture_barrier GL_SGI_color_matrix GL_SGIS_generate_mipmap GL_SGIS_texture_edge_clamp GL_SGIS_texture_lod

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Explorer ,
Oct 07, 2018 Oct 07, 2018

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You and me both, has me baffled but we're not alone.

I have a 2017 MBP 15" with 16gb RAM LR Classic CC was at time unusable, LightroomCC is better BUT the second you use DeHaze on anything it all but grinds to a halt, hence why I just use it at the very end.

I think the issue is Adobe aren't optimizing their code for Mac.

Also Lightroom CC being a version 1 product basically has no settings so I say just wait, sadly the LR CC updates are really slow.

Also have you upgraded to Mojave ? I'm doing this soon be interesting to see if it makes any difference.

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Community Beginner ,
Oct 07, 2018 Oct 07, 2018

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I used Lightroom on High Sierra and now I have updated to Mojave. But there is no difference I can discern. If anything, it's maybe running a little worse. Also, I had 8 GB of RAM and thought maybe that's the problem. Now I have 24 GB and it didn't speed up at all. Really strange, very un-maclike performance.

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Community Beginner ,
Oct 07, 2018 Oct 07, 2018

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I'm done with this nonsense. I now decided to try the Photos app built-in to macOS as a catalog solution. It has a round-trip function to external editors, so I can still use Photoshop for editing.

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Adobe Community Professional ,
Oct 07, 2018 Oct 07, 2018

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I think the issue is Adobe aren't optimizing their code for Mac.

itks funny that you can find many people on here that think just the opposite - that Adobe only optimizes on Macs and forgets about Windows and that is why performance on Windows is so slow.

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Community Beginner ,
Oct 07, 2018 Oct 07, 2018

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Most likely both is true... they are trying to save time and money developing for two incompatible platforms. So on both platforms, it's not going to run very well. It's similar to the problems with Java — write once, sucks everywhere.

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Explorer ,
Oct 13, 2018 Oct 13, 2018

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Funny, I've read in various places they've dropped the ball on their Mac coding and their windows coding is better.


Whichever way it's rubbish excuses and for a product you're paying a monthly subscription for is inexcusable.

The performance issues on Mac shouldn't in theory even be happening since it's a rather homogenous eco system compared to Windows

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Explorer ,
Oct 07, 2018 Oct 07, 2018

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I can confirm thumbnail scrolling went from super fast in Mac OS High Sierra to super slow on Mac OS Mojave. 2013 Mac Pro with 2560 x 1440 Display and dual AMD FirePro D500 3072 MB. Had to revert to Mac OS High Sierra.

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New Here ,
Oct 27, 2018 Oct 27, 2018

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I have been testing Lightroom CC again and I also find it impossibly slow on my iMac. I have less than 500 photos imported to the new CC program and the scrolling & general performance is awful. It has been the same on High Sierra & now Mojave. Classic is a little bit better but I need a cloud Library. No way I can import my entire Library into new CC. Lightroom CC on iOS works great, but I need it to work great on my Mac.

My iMac is a fully loaded Late 2015 27" iMac, 4.0 GHz Quad Core, 32 GB Ram, SSD. It is sad Lightroom is almost unusable on this machine.

Adobe, what is going on here? Are you trying to lose customers?

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Community Beginner ,
Nov 01, 2018 Nov 01, 2018

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I just wanted to chime in here too. I had been using macOS High Sierra and performance of the latest 1.x was... okay. Not great but usable. I've since upgraded to macOS Mojave and Lightroom CC 2.0 and it is frankly usable. Scrolling and general UI interaction is an exercise in frustration. So many beach balls. Jerky scrolling is a kind term for what I am seeing. If I scroll a 61 photo album it pauses, beach balls, then jumps to where the scroll stopped. I really regret migrating from LR Classic at this point.

I really love the idea of the new Lightroom but when every client *but* the desktop works and performs wonderfully I get a bit disheartened. I really hope that performance improvements on the Mac are at the top of the priority list.

I am mainly running on an 8 core Mac Pro (2013) with 64 GB of ram, but see similar performance issues on my 2018 MacBook Pro with 32 GB of ram.

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New Here ,
Nov 15, 2018 Nov 15, 2018

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Hi,

Same problem here. I have an iMac 2017 5K and the LR performance is poor and unacceptable.

I've made the latest CC updates and i'm running Mojave 10.14.1

I also have a Radeon 580 8gb which is the fastest graphic card for the iMac and 32gb RAM !

I'm running fusion drive on APFS and my catalog is this drive, not on an external one.

I also disabled automatic writing to XMP

Library scrolling is painfully slow, beach balls very often, and terribly laggy.

develop is a bit better but LR seems to be working hard when changing a slider (even with XMP disabled) since I see the turning grey dots on the bottom right almost constantly.

What's happening Adobe ???

I have a high end Apple config, LR (an the catalog) is optimized, but there is awful performance.

Please fix LR for the Mac !!!!

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Explorer ,
Nov 15, 2018 Nov 15, 2018

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That must be for Lightroom Classic then as you cannot explicitly store originals WITH xmps with the new clouds sedan LRCC.

Am 15.11.2018 um 10:14 schrieb schleima <forums_noreply@adobe.com>:

Lightroom CC abysmal performance on 2017 iMac

created by schleima in Lightroom CC — The cloud-based photo service - View the full discussion

Hi,

Same problem here. I have an iMac 2017 5K and the LR performance is poor and unacceptable.

I've made the latest CC updates and i'm running Mojave 10.14.1

I also have a Radeon 580 8gb which is the fastest graphic card for the iMac and 32gb RAM !

I'm running fusion drive on APFS and my catalog is this drive, not on an external one.

I also disabled automatic writing to XMP

Library scrolling is painfully slow, beach balls very often, and terribly laggy.

develop is a bit better but LR seems to be working hard when changing a slider (even with XMP disabled) since I see the turning grey dots on the bottom right almost constantly.

What's happening Adobe ???

I have a high end Apple config, LR (an the catalog) is optimized, but there is awful performance.

Please fix LR for the Mac !!!!

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Community Beginner ,
Dec 08, 2018 Dec 08, 2018

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Just to add another voice with the same problem. My iMac Pro is 2017, 3 GHz Xeon W 10 cores, 64 GB, Pro Vega 64. Shoulkd be fast as lightning, but when working with Lightroom Classic or Bridge I feel set back in the 60ties working with an abacus ...

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New Here ,
Jan 14, 2019 Jan 14, 2019

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Chiming in here to see if any more information can come from Adobe? Lightroom is in desperate need of a huge performance increase -

I would be somewhat happy if I can just scroll smoothly. Apple Photos can do this, Luminar 3 can do this, Lightroom CC on iOS can do this.

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New Here ,
Jan 26, 2019 Jan 26, 2019

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I was super excited when I got my CC subscription a few years ago and learned how Lightroom worked and the organization and everything, but was immediately disappointed after I imported my photo library (I use dropbox, not apple for my photos so I had no prior catalog or editor besides PS).

Performance was insanely bad.  I was ready to go aND quickly sort through a good chunk of my photos with the maps view but performance on it was identical, worse actually, than a 1991 smith-corona word processor I bought just for fun.  The word processor had to slowly redraw the whole screen every time you edited something but lightroom has even more lag than that.

I gave up on it, occasionally checked back after updates, assumed it was my older MBP, kept reading more and more and saw the same complaints from new mac pro/imac pro owners with maxed out ram, burly GPUs/CPUs and nothing but confirmation that lightroom is horrendously slow and worse with every update.

100% not using the new cloud based one so I guess that leaves me looking for alternatives while I continue to pay $53 per month for the few apps I can use (illustrator, photoshop, after effects, premiere pro).

Adobe thinks they are too big to fail apparently and that may be true, but its very frustrating and disappointing.

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New Here ,
Jan 27, 2019 Jan 27, 2019

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The performance everyone here is experiencing is unacceptable, especially taking into account the min specs Adobe is calling for.

--Multi Core CPU

--4 GB Ram (8GB recommended)

--2GB Harddrive

--1 GB Video RAM (VRAM). 2 GB of dedicated VRAM (4 GB recommended) for 4k & 5k monitors

I cannot remotely image Lightroom on a min spec'd machine. My quad-core 4 ghz i7, 32GB RAM, SSD, 4GB VRAM runs like garbage. This is with a test library with under 200 photos.

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Adobe Community Professional ,
Jan 27, 2019 Jan 27, 2019

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With slow performance the questions are always:

  • How large are your raw files? If you are dealing with 40+ MP raw files, you will need a beefy machine. If you have 24 MP files predominantly, even a 2012 Mac Book Pro will do fine. I have this machine and this is the breakup. I need my much faster 2018 MBP for the files from the high MP camera. It is frustrating on the old machine but more normal file sizes are just fine on the older machine.
  • How much free space do you have on your startup disk? If it is any lower than 100GB, free up space on this disk. SSD drives need to be at least >25% but ideally >50% free to perform well.
  • Are you running any antivirus software? Many AV packages slow down Lightroom to molasses speed. If you run any of this, make sure you exclude the Lightroom catalog/library file(s) and the preview databases from scanning, otherwise the catalog will get rescanned every time you make a single change.
  • If running Classic, are the previews in your catalog set to the correct size for your display? Usually this is the Auto setting.
  • Do you have sufficient bandwidth? Lightroom CC needs to download and upload raw files which will easily completely max out your connection even to the point that when it is uploading in the background and if your router is not smart, it can make everything else glacial. Many home routers are not smart enough to do this right and balance traffic. Worse, many people's internet connections are strongly asymmetric with very small upload bandwidth (5 Mbps is typical). Lightroom CC will easily saturate this and again with typical routers, your download traffic will stall when that happens which can adversely impact scrolling and editing in Lightroom. It can be a good idea to invest in a good quality router that load balances or does QoS or to have a cable modem (if you have cable internet) that has enough channels (the root cause for the slowdowns if your upload bandwidth is saturated).
  • Are you running any firewall software? Lightroom CC is very sensitive to this and can show stalls and slowdowns with aggressive firewalls.
  • Do you do a lot of brushing and/or cloning on your images? This is the one thing that will slow down everything considerably, especially if you also enable lens corrections and upright corrections.

I am typing this in a 2012 13" MBP that does run antivirus software, has 16GB internal memory and an older built in Intel video card with just 1GB of VRAM. It works just fine with Lightroom CC and Classic (I use both alongside each other) as long as I don't want to edit a whole bunch of images from my Z7. Doing edits on files from my older cameras is great. My 2018 tricked out MBP works great with the Z7 files or with giant panoramas assembled from those or my older cameras.  I do agree that the minimum requirements Adobe gives are completely laughable. I can't imagine the experience on a machine like that being even close to acceptable with raw files from reasonably current cameras. I would say the minimum reasonable amount of RAM is 16 GB (although I have seen Lightroom run fine on 8GB machines) and an internal SSD of at least 500GB that is 50% empty.

It is mystifying why some people with super beefy machines get such bad performance. That's not been my experience but Adobe should really figure out why some people have glacial performance.

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New Here ,
Jan 31, 2019 Jan 31, 2019

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Hey, I am following this, as it is the most recent thread I can find on the matter. I am currently running Bridge CC, PS CC and LR CC Classic (not necessarily at the same time). My 2010 MacBook (not pro) is officially obsolete from OS update perspective and I am in the market for a good used/refurbished one. I am including a photo (at right) of what I have now and below I am posting info on, roughly, what I am looking to get. What are anyone's thoughts, as these threads are scaring me a bit. I currently use a Canon 5DIII and edit RAW and JPG files. No video and no LR CC Cloud. Thanks!

OS info.jpg

I want to go to something more like this in a minimum 2015 (but likely '16 or '17):

  • iMac
  • Display Size: 21.5"
  • Processor: Intel Core i5 3GHz
  • RAM: 16GB
  • Storage: 1TB HDD
  • Graphics: AMD Radeon Pro 555

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New Here ,
Feb 01, 2019 Feb 01, 2019

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I am having the same issues on a Mac Pro with 32GB RAM using the internal SSD. I've tried everything but scrolling is so slow it makes Lightroom completely unusable.

Screen Shot 2019-02-02 at 11.24.31 am.png

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New Here ,
Mar 14, 2019 Mar 14, 2019

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I have exactly the same problem with Lightroom CC on two recent Macs:

A MBP

Schermafbeelding 2019-03-14 om 15.29.59.png

And a 2018 Imac

Schermafbeelding 2019-03-14 om 15.34.03.png

I don't see any reactions from Adobe on this post. This is a official adobe forum right? I would expect a reaction/statement from Adobe on this matter.

Paul

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Adobe Community Professional ,
Mar 14, 2019 Mar 14, 2019

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I don't see any reactions from Adobe on this post. This is a official adobe forum right? I would expect a reaction/statement from Adobe on this matter.

This is a user-to-user forum and very few Adobe employees hang out here and Adobe very seldomly comments here. The official feedback and bug report forum is at https://feedback.photoshop.com . The same login as here works there. That forum is actually monitored by engineers and they will report if they can reproduce the issue and whether it will be fixed in the next release there.

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Explorer ,
Apr 30, 2019 Apr 30, 2019

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When I colorgrade a 4k raw image in lightroom on my 2017 imac, the program uses up to 500% of my cpu to get the job done. That is unacceptable.

My specs:

iMac2017 5K

4,2 gHz i/

4gb ram

Radeon 580 8gb

I mostly work with video and premiere isn't much better. I'm switching to Davinci Resolve. Free of charge and runs smooth without taking up more than all of the computing power.

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Explorer ,
Jun 07, 2019 Jun 07, 2019

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Problem is fixed for me with Lightroom 2.3 (Mac Pro 2013)!

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New Here ,
Jun 21, 2019 Jun 21, 2019

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I have a 21.5" iMac 4K 3.0 GHz quad-core Intel Core i5 and 8GB of RAM. My RAW files are large, 80+ megabytes each. Performance in complex tasks like panoramic stitching was abysmal, up to 45 minutes.

I just upgraded from 8 to 32GB of RAM and same stitching is done in less than 2 minutes.

Adobe should stop stating that 4 GB is minimal and 8 is recommended.

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New Here ,
Feb 16, 2020 Feb 16, 2020

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Imac pro with 32GB ram and the same issue... this is very annoying, i deliberately bought a Imac pro for foto editing and now the software is running unexpected abysmally. Hope Adobe will correct this in near future

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