I am using a Gaomon S620 graphics tablet and running macOS Catalina version 10.15.6, although my question doesn't, I think, depend on my specific tablet/OS version.
It used to be the case (before Mojave I think?) that you could plug a graphics tablet into a mac and it would immediately work fine with literally no driver installed. (No fine pressure control or whatever, but I don't need this.) Now I'm guessing that to due some added security restrictions, when I plug in my graphics tablet without downloading Gaomon's driver, my computer recognizes pen movement (the cursor moves), but I am unable to click on anything.
I say that my specific model doesn't matter because many people have had this problem with different tablets: https://www.reddit.com/r/wacom/comments/9003e4/intuos_pro_my_tablet_pen_hovers_just_fine_but/ https://www.reddit.com/r/wacom/comments/a62n30/tap_to_click_not_working_on_intuos_pro/ https://www.gaomon.net/question/macos_mojave_catalina_solution.html
I know how to solve this issue if I have Gaomon's driver downloaded. Go to Security and Privacy --> Accessibility, etc.
(Basically follow the steps here and give your third-party driver access to your computer.)
But I want to use my graphics tablet without installing a third-party driver. Is there a way to reenable this functionality?
For reference, I am having problems with lag, and I want to check whether it is my driver's fault or if it is just due to high CPU usage. But I can't check because I can't use my graphics tablet anymore without the third-party driver.
Edit: To clarify, I never experience lag (whether the Gaomon third-party driver is installed or not) when just moving the cursor. Lag only occurs when I press down and draw. But as stated above, I can only draw when the third-party driver is installed, as otherwise it doesn't recognize clicks.