Can you please post your "System Info" [LR -> Help -> System Info]
You could try turning off the graphics processor in Lightroom preferences under the Performance tab.
Here, also is a list of general ways to enhance Lightroom performance:
Thanks SO much, Sumeet!!
Here's system info. If you want remaining detalis on other settings, please let me know. Here are the basics:
Lightroom Classic version: 8.0 [ 1193777 ]
License: Creative Cloud
Language setting: en-US
Operating system: Mac OS 10
Version: 10.13.6 [17G65]
Application architecture: x64
Logical processor count: 36
Processor speed: 2.3 GHz
Built-in memory: 131,072.0 MB
Real memory available to Lightroom: 131,072.0 MB
Real memory used by Lightroom: 4,005.1 MB (3.0%)
Virtual memory used by Lightroom: 10,220.1 MB
Memory cache size: 189.5MB
Internal Camera Raw revision: 61
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 503MB / 65535MB (0%)
Camera Raw real memory: 517MB / 131072MB (0%)
Displays: 1) 5120x2880, 2) 2560x1440, 3) 5120x2880
Graphics Processor Info:
Metal: AMD Radeon Pro Vega 64
Application folder: /Applications/Adobe Lightroom Classic CC
Library Path: /Users/jamesthompsonimacpro/Pictures/MasterLRCat080918/MasterLRCat080918.lrcat
Settings Folder: /Users/jamesthompsonimacpro/Library/Application Support/Adobe/Lightroom
Glad it helped you !
Could look into upgrading your graphics driver ? Maybe that should resolve the issue.
Here, also is a list of general ways to enhance Lightroom performance:https://helpx.adobe.com/lightroom/kb/optimize-performance-lightroom.html