We should test AD on macOS Big Sur/Silicon.
So far, we do not have the machine so labeled as help wanted.

Unable to install Appium.app (1.18.3)
Platform: Macbook 2017 Intel / Big Sur 11.0.1
Fixes tried:
xattr -rd com.apple.quarantine Appium.app
Changing permissions to Read Only / Read & Write
Yes, https://github.com/appium/appium-desktop/issues/1217 is a related issue.
Installing via .dmg instead of .zip solved this problem.
I tested a bit on M1 macOS env as well.
No blocking issues were there.
Most helpful comment
Installing via
.dmginstead of.zipsolved this problem.