Lightroom 7.2 is a spinning wheel fest on my Mac Pro (2013) with every mouse movement.

My issue was resolved by reformatting. Sorry for not updating. It had nothing to do with Adobe. More to do with Apple.

When I had performed the upgrade to High Sierra it had formatted my SSD incorrectly, partitioning my boot volume incorrectly.

Hi, i searched my issue and found this thread!  oh my!  so much info I can't figure out what worked, if anything?  I am having the same issue... have a iMac (late 2012) with plenty of hard drive space and 8gb RAM and every third click I make in Lightroom I get the spinning rainbow wheel.  I can't figure out how to fix this and I have tons of sessions to edit and can't do so in a timely manner.  Did anyone find a good solution, or at least helpful?  I am still running 7.1, haven't upgraded to 7.2... not sure if I should. 

Just wanna chime in, also having issues on Mac Pro. Posted about it here:

Lightroom Classic CC 7.2 | High Sierra | Mac Pro 6,1 - Suddenly unable to import. Extremely Slow performance. Unusable. …

Hi Adobe Team, Been using Adobe products for almost 20 years now and don't normally have issues but am at a bit of a loss here. Recently (last week or so), after either High Sierra or LR update, my LR has become unusable. Importing fails. It's takes an extremely long time for the image selection window to even preview images. As well as the import process itself freezing the app. No photos/file actually import. Library view renders images with artifacts and takes an extremely long time to load new previews. Develop tab takes an extremely long time to autosync adjustments and render. It took 5 hours to autosync 52 images adjustments. Exporting/Publishing images freezes or takes and extremely long time as well. Steps taken to try and fix: Reset Preferences Disabled GPU Disabled all background processes such as Sync/Face/Address Added Prefer OpenGL config file Reinstalled Lightroom Reverted to previous version (7.1) Repaired disk permissions Made a new catalog Unfortunately none seem to work. Would really really love some help resolving this issue. Thank you!! System Info: Lightroom Classic version: 7.2 [ 1156743 ] License: Creative Cloud Language setting: en-US Operating system: Mac OS 10 Version: 10.13.3 [17D102] Application architecture: x64 Logical processor count: 16 Processor speed: 3.0 GHz Built-in memory: 65,536.0 MB Real memory available to Lightroom: 65,536.0 MB Real memory used by Lightroom: 545.2 MB (0.8%) Virtual memory used by Lightroom: 5,632.2 MB Memory cache size: 0.0MB Internal Camera Raw revision: 894 Maximum thread count used by Camera Raw: 5 Camera Raw SIMD optimization: SSE2,AVX Camera Raw virtual memory: 0MB / 32767MB (0%) Camera Raw real memory: 0MB / 65536MB (0%) Displays: 1) 2560x1440 Graphics Processor Info: Metal: AMD Radeon HD - FirePro D700 Application folder: /Applications/Adobe Lightroom Classic CC Library Path: /Volumes/G-SPEED Shuttle XL TB3/Lightroom Catalog/2015/2015-2.lrcat Settings Folder: /Users/cameronrad/Library/Application Support/Adobe/Lightroom Installed Plugins: 1) AdobeStock 2) Aperture/iPhoto Importer Plug-in 3) Canon Tether Plugin 4) Facebook 5) Flickr 6) Nikon Tether Plugin 7) Pixieset Config.lua flags: None AudioDeviceIOBlockSize: 512 AudioDeviceName: USB AUDIO    DAC AudioDeviceNumberOfChannels: 2 AudioDeviceSampleRate: 48000 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 D700 OpenGL Engine GL_SHADING_LANGUAGE_VERSION: 1.20 GL_STENCIL_BITS: 8 GL_VENDOR: ATI Technologies Inc. GL_VERSION: 2.1 ATI-1.60.26 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

Can anyone advise how to roll back to 7.1 pls? (I'm on Mac)

I've had nothing but issues since upgrading yesterday. I've had to force quit four times in the five hours I've TRIED to work, but gotten nothing done except for frustration. I took me 20ish minutes to export one photo (one 3MB file). When I tried to export the same photo again, it took 8 minutes for the overwrite pop-up message to appear. The Develop module is completely unusable.

Hey PPhotography808​, VSV​, SA-photo​,

I know a couple of you have already rolled back but we'll need the System Info from 7.2 to try and narrow down what could be causing this particular issue for all three of you. Once you get System Info here, I'll pass this over to members of the team.

Thanks,

Melissa

This is my point exactly.  The first, and generally only, solution to the problem is to turn off the GPU acceleration.  This still does not work.  It makes the develop module slower and then eventually the same scenario that happens with the GPU disabled happens.  If you continue to edit then you are forced to kill the program using Task Manager and some of the edits you are working on are trashed.  I disagree that version 7.1 is working like a champ.  I was looking forward to this update because 7.1 was all but useless.  After less than 5 minutes of editing I was forced to trouble shoot the issue to no avail.  This seems to have been the case since the update in December.  I really thought Adobe was going to address this issue in the new update.  That was not the case what they did was make changes that was to help "super users" with large RAM.  Which apparently did not work either.  I'm tired of trouble shooting Lightroom.  I've spent hundreds of dollars and countless hours reading & educating myself on the problem and have gotten nowhere.  Then I see this post.  The problem is not unique to Windows users.  The same symptoms occur on Mac's too.  The problem needs to be addressed and fixed. There is an abundant amount of information including full system information sent in by hundreds of people that Adobe can refer too to solve this problem.

I am a photographer not Adobe's IT program analyst.  I want to quickly and efficiently edit my photos and move on.  I'm not.  I'm typing in this column not asking from help from the community but asking Adobe to read the information and requirements out there and solve them. Adding great grand things does nothing to help me when the system crashes every single time I use it in less than minutes.  It has been doing this for to long and with every new update it seems to get worse.  Stop with the work arounds.  I do think it is a GPU problem but it is a program to GPU interface problem. !

Have you tried to deactivate the GPU support?

Adobe Lightroom GPU Troubleshooting and FAQ