1. Check User Permissions: Ensure that the user accounts on your MacBook Air have the necessary permissions to switch users. Go to System Preferences > Users & Groups and verify the settings for each user account.
2. Restart Your MacBook Air: Sometimes, a simple restart can help resolve temporary glitches. Restart your MacBook Air and see if the issue persists.
3. Verify Fast User Switching: Confirm that Fast User Switching is enabled. Go to System Preferences > Users & Groups > Login Options and make sure that Fast User Switching is turned on.
4. Reset SMC and NVRAM: Resetting the System Management Controller (SMC) and the Non-Volatile Random Access Memory (NVRAM) on your MacBook Air might help resolve this issue. Instructions on how to do this can be found on Apple's support page.
5. Update macOS: Check if there are any available macOS updates. Updating to the latest version can often resolve software-related issues and bugs.
6. Check for Third-Party Software: If you have any third-party software installed that might be interfering with user switching, try disabling or uninstalling them to see if the issue persists.
7. Test without Touch ID: To troubleshoot the Touch ID issue, try logging in without using Touch ID to see if user switching works as expected.
8. Contact Apple Support: If the problem continues, it's recommended to reach out to Apple Support for further assistance. They can provide more specific guidance based on your MacBook Air model and the macOS version you're using.