Allow button in Privacy & Security System Settings does not work
The allow button in Privacy & Security System Settings should be hidden after you click it.
If the button does not hide after click, you did not succeed to click it.
![system-extension-allow@2x.png](/docs/help/troubleshooting/allow-button-does-not-work/images/system-extension-allow@2x.png)
Reason
The exact cause of the issue has not been determined, but it may be caused by the corrupted system cache by a macOS issue.
This issue may be resolved by starting macOS in safe mode to refresh the system cache.
Steps
- Restart your Mac in safe mode by this instruction.
- Open Karabiner-Elements from Launchpad to ensure that Allow button is shown on System Settings.
- Open System Settings and confirm the Allow button is shown.
If the Allow button is hidden, close System Settings and open it again. - Click the Allow button.
- Restart your Mac and boot in normal mode.