P: Spot Removal Cursor Not Visible

Uninstalled/reinstalled Logitech software. Installed latest OS from Apple 10.15.4 Nothing changed.

Logitech Mouse driver software is known for creating occasional visual artifacts. I would reinstall the driver software for the mouse with the latest from Logitech's site.

Logitech MX2 Anywhere mouse.

Whose mouse are you using?

Not in LR full screen mode. Not Mac full screen mode. H and Q operate fine. It’s the cursor that disappears.

"I am not in full screen mode - just the normal Develop window."

Just to be clear, are you talking about Lr's full screen view or the MacOS full screen mode?
Are you sure you're not running Lr in the MacOS full screen mode?

Use apps in full screen on Mac

Pressing the [ H ] key do anything?

Thanks for the replies. I am not in full screen mode - just the normal Develop window. No pointing devices (other than mouse) are attached. No tablets - just the vanilla iMac and a mouse. I have tried changing the the cursor size, feathering, and opacity with no result. I have used the spot removal tool for many years and am well aware how it works. All my catalogs display the same problem on my iMac but not on my laptop. They all work correctly on my laptop. It does not matter whether the catalog is on an external hardwire or on the iMac's own disk; the problem persists.

I've tested Lightroom Classic 9.2 on Catalina 10.15.3 in Window, Maximized, Full Toggle 1 and Full Toggle 2 and do not see any issue with the tool's cursor before or after the
Spot Removal has been applied.  

As expected the tool is disabled in Mac Full Screen. 

Are you using any pointing devices? Tablets? etc?

Not a problem on Windows. Are you sure that you didn't size it too small because then it does disappear? On Windows, just rotate the scroll wheel.