Please post your System Information as Lightroom Classic (LrC) reports it. In LrC click on Help, then System Info, then Copy. Past that information into a reply. Please present all information from first line down to and including Plug-in Info. Info after Plug-in info can be cut as that is just so much dead space to us non-Techs.
Lightroom Classic version: 9.4 [ 202008061458-dbb2971e ] License: Creative Cloud Language setting: en-GB Operating system: Mac OS 10 Version: 10.15.7 [19H2] Application architecture: x64 Logical processor count: 8 Processor speed: 2.5 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: 1,539.8 MB (9.3%) Virtual memory used by Lightroom: 8,707.8 MB Memory cache size: 55.3MB Internal Camera Raw version: 12.4 [ 555 ] Maximum thread count used by Camera Raw: 5 Camera Raw SIMD optimization: SSE2,AVX,AVX2 Camera Raw virtual memory: 119MB / 8191MB (1%) Camera Raw real memory: 120MB / 16384MB (0%) Displays: 1) 2880x1800