Since update to LR Classic 10, I seem to be having intermittent problems with using a mouse with it. Specifically, clicking with a mouse within the program periodically becomes extremely slow. That is, the response to a click comes as much as 15 to 20 seconds after clicking. Movement of the cursor is not affected. I do not experience this lag when using the mouse with other programs.
While I am at it, I want to mention that, with recent versions of LR Classic, LR seems to be taking much longer to open, and often seems to often become unresponsive for a period of time in the course of opening. I do not assert any connection with the problem I mention above, but it makes me wonder.
Please post your System Information as Lightroom Classic (LrC) reports it. In LrC click on Help, then System Info, then Copy. Paste 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: 10.0 [ 202010011851-ef6045e0 ] License: Creative Cloud Language setting: en-US Operating system: Mac OS 10 Version: 10.14.6 [18G6042] Application architecture: x64 Logical processor count: 8 Processor speed: 4.2 GHz SqLite Version: 3.30.1 Built-in memory: 32,768.0 MB Real memory available to Lightroom: 32,768.0 MB Real memory used by Lightroom: 1,975.3 MB (6.0%) Virtual memory used by Lightroom: 29,135.2 MB Memory cache size: 2,362.7MB Internal Camera Raw version: 13.0 [ 610 ] Maximum thread count used by Camera Raw: 5 Camera Raw SIMD optimization: SSE2,AVX,AVX2 Camera Raw virtual memory: 2649MB / 16383MB (16%) Camera Raw real memory: 2663MB / 32768MB (8%) Displays: 1) 5120x2880
Graphics Processor Info: Metal: AMD Radeon Pro 580