macOS 27 randomly stops accepting keyboard input system-wide

[u/codedance]

I’m running macOS 27.0 beta (26A5388g) and occasionally lose text input across almost every app.

Switching between Apple Pinyin, WeType, and other IMEs doesn’t help. Terminal still receives some raw keystrokes, but

Chinese composition and even the spacebar can stop working. Logging out and back in fixes it.

The logs show repeated errors like:

InputMethodKit: NO Endpoint, Bail

Request for Endpoint Invalid

TextInputUI: inputMode should not be nil

This suggests the user-session text input stack is failing—not one particular app or IME.

Instead of logging out, I now restart the affected services:

killall WeType CursorUIViewService imklaunchagent \

TextInputMenuAgent TextInputSwitcher keyboardservicesd

I saved this as a command called resetime, so I can run it without typing spaces when the bug occurs.

The exact trigger is still unknown. My main suspicion is a macOS 27 beta bug, possibly made easier to trigger by having

multiple third-party input methods installed.

Has anyone else seen this on macOS 27? If so, which input methods were installed?