Slow Performance on Mac

Solved for me with Lightroom CC 2.3. The difference is night and day from unusable with Mojave to super fast and smooth (Mac Pro 2013)!

With MacOS 10.13.6 HighSierra gridview scrolling is a lot smoother. The only difference between High Sierra and Mojave I notice is the ATI GL Driver version:

High Sierra (gridview scrolling ok): GL_VERSION: 2.1 ATI-1.68.21

Mojavv (gridview scrolling very slow): GL_VERSION: 2.1 ATI-2.4.10

Lightroom CC version: 2.1.1 [ 20181211-1217-31970e4 ] (Dec 11 2018)

Operating system: Mac OS 10

OS Version: 10.13 [6]

Application architecture: x64

Logical processor count: 12

Processor speed: 3,5 GHz

Built-in memory: 16.384,0 MB

Real memory available to Lightroom CC: 16.384,0 MB

Real memory used by Lightroom CC: 713,9 MB (4,3%)

Virtual memory used by Lightroom CC: 1.518,9 MB

Memory cache size: 403,9 MB

Internal Camera Raw version: 11.1 [ 112 ]

Maximum thread count used by Camera Raw: 7

Camera Raw SIMD optimization: SSE2,AVX

Camera Raw virtual memory: 57MB / 8191MB (0%)

Camera Raw real memory: 58MB / 16384MB (0%)

Displays: 1) 2560x1440

Graphics Processor Info:

Metal: AMD Radeon HD - FirePro D500

Application folder: /Applications/Adobe Lightroom CC

Settings Folder: /Users/markus/Library/Application Support/Adobe/Lightroom CC

AudioDeviceIOBlockSize: 512

AudioDeviceName: Built-in Output

AudioDeviceNumberOfChannels: 2

AudioDeviceSampleRate: 44100

Build: Uninitialized

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 - FirePro D500 OpenGL Engine

GL_SHADING_LANGUAGE_VERSION: 1.20

GL_STENCIL_BITS: 8

GL_VENDOR: ATI Technologies Inc.

GL_VERSION: 2.1 ATI-1.68.21

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

I am suffering from the same problem. The strange thing is, performance and especially grid view scrolling was smooth for me with MacOS HighSierra 10.13. It is unbearably slow with intermittent beachballing in MacOS Mojave 10.14.3. I did a clean install of MacOS and Lightroom CC but it did not help. System is a MacPro 2013 with Dual AMD FirePro D500 Graphics. I will revert back to MacOS HighSierra.

Lightroom CC version: 2.1.1 [ 20181211-1217-31970e4 ] (Dec 11 2018)

Operating system: Mac OS 10

OS Version: 10.14 [3]

Application architecture: x64

Logical processor count: 12

Processor speed: 3,5 GHz

Built-in memory: 16.384,0 MB

Real memory available to Lightroom CC: 16.384,0 MB

Real memory used by Lightroom CC: 662,8 MB (4,0%)

Virtual memory used by Lightroom CC: 1.534,2 MB

Memory cache size: 406,1 MB

Internal Camera Raw version: 11.1 [ 112 ]

Maximum thread count used by Camera Raw: 7

Camera Raw SIMD optimization: SSE2,AVX

Camera Raw virtual memory: 22MB / 8191MB (0%)

Camera Raw real memory: 22MB / 16384MB (0%)

Displays: 1) 2560x1440

Graphics Processor Info:

Metal: AMD Radeon HD - FirePro D500

Application folder: /Applications/Adobe Lightroom CC

Settings Folder: /Users/markus/Library/Application Support/Adobe/Lightroom CC

AudioDeviceIOBlockSize: 512

AudioDeviceName: Built-in Output

AudioDeviceNumberOfChannels: 2

AudioDeviceSampleRate: 44100

Build: 12.1x4

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 - FirePro D500 OpenGL Engine

GL_SHADING_LANGUAGE_VERSION: 1.20

GL_STENCIL_BITS: 8

GL_VENDOR: ATI Technologies Inc.

GL_VERSION: 2.1 ATI-2.4.10

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

According to this link, grid view is only GPU accelerated on windows. Huge bummer. Wonder why?

Adobe Lightroom GPU Troubleshooting and FAQ

Hi Akash.
I worked with Adobe support over chat last night. We conducted a screen share and created a local admin account. In the end, there was no improvement in Lightroom CC performance.

One thing I realized is that I recall this app working smoothly and it was before the switch to Metal API.

I can say it is slow on my Macbook Pro 15 2017, than they say i have not enough power, so i buy a Imac Pro with 10 core, 64 gb Ram, Vega 64, and now: its like the same shit. The Program is slow and i switcht now to my Ipad Pro looool, there its smooth, from 1 Week i Buy a PC ( Windows ) with 8 Core and the Titan XP, and it runns so butter Smooth, so my think is Adobe will you to buy a Windows PC.

Not fine, but its ok. So now i sell my Apple Books and buy a Surface. And yes i make Videos from the Prefomance on the Imac Pro, Macbook and Windows PC. Its very bad, but when Adobe not Suport OS X so whe can do nothing. And no the EGPU ist the same shit :-) nice Wishes from Austria / Tirol. 

Hi whiteonline,

Sorry about the slow scrolling performance in Lightroom CC. Are you using a 5K retina display or any other high-res display with your Mac?

Couple of things you may check:

• Which mode are you browsing your images in "Photo Grid" or "Square Grid" ?How much storage is showing up as available in the Preferences> Local storage menu?
• What is the Photo cache size?
• Making sure that you have the latest version of Lightroom CC installed.

Also, post the System info report  from Preferences> General meu.

Regards,

Akash