P: Slow UI when using Mac and Custom Display Profile

Just adding my voice to the conversation.

late-2015 5K iMac

4Ghz i7

24GB RAM

Radeon R9 M395X 4GB

Mojave 10.14.6

Terribly slow UI throughout.  Scrolling grid view in Library is painful.

When you stop scrolling takes a few seconds to update the shooting info displayed around the thumbnails.  

Basically doing anything is just laggy.  Opening the paint brush for keyboarding...slow. On and on.

I'll be rolling back to 9.4 before my next shoot unless new version is out.

Also enabling or disabling GPU acceleration makes no difference

I am also experiencing the slow scrolling issue after upgrading to LR 10. I am on a maxed out 2020 iMac with Radeon Pro 5700 XT 16GB. It is slow and painful to navigate through my catalogs this way. Downgrading to 9.x until this gets sorted out.

I am also experiencing this after upgrading. Specifically, LRC10 is experiencing a delay when switching between photos in the Library Loupe view.

It appears tied to the zoom level:

• When the zoom is set to 100% or greater, the performance is normal.
• But when zoom is below 100% (whether a preset value like 50%, Fit, Fill, or a custom value like 71.2%), it takes 3-5 seconds to switch between photos, and the spinning beachball appears.

Other notes:

• Slow down (with beachball) also happens when shift- or command- selecting multiple thumbnails in the Filmstrip
• This issue happens with files that LR9 handled nearly instantaneously, and that are pre-rendered 1:1 previews.
• Other parts of the UI (dragging sliders in Develop) are not impacted.
• I do have an older, but still supported, video card. Changing the "Use Graphics Processor" (Preferences >  Performance) setting from the default Auto to either Off or Custom doesn't resolve this.

 Thank you.

My system: OS 10.15.7, on Mac Pro (Late 2013) 2.7 Ghz 12-core Xeon with AMD FirePro D500 3GB, 64 GB RAM.

I have the same problem with LR 10.0. Each click needs 1-2 seconds until I can see a reaction and the pictures don't load immidiate and first have a grain overall the image. With LR classic 9.4 I did'nt have any problems too! It's impossible to work with the new release and culling and organizing pictures is a pain. I hope too, there will be a solution soon. Thank you!

My system:

Lightroom Classic version: 10.0 [ 202010011851-ef6045e0 ]
License: Creative Cloud
Language setting: en-GB
Operating system: Mac OS 10
Version: 10.14.6 [18G6032]
Application architecture: x64
Logical processor count: 12
Processor speed: 3.3 GHz
SqLite Version: 3.30.1
Built-in memory: 16,384.0 MB
Real memory available to Lightroom: 16,384.0 MB
Real memory used by Lightroom: 5,947.0 MB (36.2%)
Virtual memory used by Lightroom: 16,034.0 MB
Memory cache size: 725.0MB
Internal Camera Raw version: 13.0 [ 610 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2
Camera Raw virtual memory: 1819MB / 8191MB (22%)
Camera Raw real memory: 1908MB / 16384MB (11%)
Displays: 1) 1920x1200, 2) 1920x1200

Graphics Processor Info: 
Metal: AMD Radeon HD Tahiti XT Prototype

Application folder: /Applications/Adobe Lightroom Classic
Library Path: /Volumes/SSD STORAGE/Lightroom/Lightroom Catalog MK main-v10.lrcat
Settings Folder: /Users/studio/Library/Application Support/Adobe/Lightroom

Installed Plugins: 
1) AdobeStock
2) Aperture/iPhoto Importer Plug-in
3) Facebook
4) Flickr
5) Nikon Tether Plugin
6) OPAL - Opacity Slider

Config.lua flags: None

AudioDeviceIOBlockSize: 512
AudioDeviceName: $$$/dvaaudiodevice/SystemDefaultAndEffectiveDeviceName=System Default (Fireface 800 (94F))#{comment}DVAAU-4201250: Open the audio hardware preferences page.
AudioDeviceNumberOfChannels: 28
AudioDeviceSampleRate: 48000
Build: LR5x42
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 HD Tahiti XT Prototype OpenGL Engine
GL_SHADING_LANGUAGE_VERSION: 1.20
GL_STENCIL_BITS: 8
GL_VENDOR: ATI Technologies Inc.
GL_VERSION: 2.1 ATI-2.11.22
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 

To add I can confirm that (after trying what someone mentioned earlier) resizing the Mojave Lightroom window to make it smaller (like half the size) makes it run much quicker in the Library module, otherwise I get 1-2 seconds lag between each image click, and scrolling is very laggy and jerky.  Hope this helps your engineers in fixing the issue.

I tried Onyx when I first had this problem, it made no difference. V9 worked great, v10 now has an extremely laggy and slow (almost unusable) catalog/library interface. It's clearly a software issue.

Same problem for me since v10. The library module and generally navigating the catalog is almost unworkable running on Mojave, everything on SSDs, 16GB RAM, 12 cores. Was totally fine on v9. Contacted support and they asked me to import some images into a brand new catalog, same problem, even with just a few images catalog is extremely slow/laggy.

"Open in Low Resolution" is not available in Mojave. If it is then it is some where other than in Get Info. Or, maybe on certain hardware configurations.