Why do my display configuration changes stay pending after I click Apply?

The changes remain pending until BetterDisplay successfully installs the system configuration. If Apply fails or authorization is cancelled, the red Apply/Undo notice can remain. That is different from successfully applying a configuration whose new modes still need activation or a restart.

Apply writes all pending display-model configuration changes, so review the staged edits before continuing. Follow any privileged-helper approval or administrator authorization requested by the app. If the operation reports an error, save its full text. The error may concern authorization or installation rather than the resolution you entered.

You can hold Shift while choosing Apply to request the administrator-prompt path. This still requires authorization. BetterDisplay also tries that path if its privileged helper fails. Choosing it is not a way to bypass system permissions.

If Apply still fails, open App Menu > Tools > Show Console, enable Logging, then reproduce the failure once and copy the relevant messages. Look for the error accompanying Something did not work out while applying the display configuration. A helper failure, cancelled authorization and script error are different outcomes. See console logging for how to capture the details.

Use the full message to identify the component that failed. A script-error number alone may not explain the cause. Avoid broad permission resets or plug-in removal until the error points to them. Diagnostic logging collects evidence rather than fixing the failure.

After a successful Apply, complete any activation or restart offered by the app, then check the display's Display Mode menu. Selecting Undo instead discards the pending configuration edits. See system configuration changes and adding HiDPI resolutions for the full sequence.

For the underlying rendering method, see what flexible scaling and custom resolutions change.