Disabling Login Shake Effect Is there any way to disable the login "shake" effect when an incorrect password is entered? All the results I found while googling were about an unrelated issue (how to disable the "shake mouse pointer to locate" accessibility feature). I'm running macOS High Sierra (10.13.6).
Shake animation is the visual indicator for letting the user know that the password was incorrectly entered. Therefore, if it could be disabled, there would be no way for the user to know that they entered the wrong password. 

There is no way (either via System Preference or a hack) to disable the animation.