How to Fix Mac Screen Not Waking From Sleep in macOS Tahoe

Many users are experiencing issues with their Mac screens not waking from sleep after updating to macOS Tahoe. This typically occurs when opening the laptop lid or after the display times out. Here’s a comprehensive guide to resolve this problem.

Immediate Solutions to Try First

1. Force Wake Your Mac

• Close the lid completely for 10 seconds, then reopen

• Press any key on the keyboard or the power button once

• Connect power adapter and press Touch ID/power button for 3 seconds

• Connect external monitor to check if system is running

2. Check Power Connection

• Ensure your Mac is adequately charged or plugged in

• Try different power outlets and cables

• Check for charging indicators

Advanced Troubleshooting Steps

For Intel Macs:
Reset NVRAM/PRAM:

1. Shut down Mac completely

2. Turn on and immediately press Option + Command + P + R

3. Hold for 20 seconds, then release

Reset SMC:

1. Shut down Mac

2. Hold Shift + Control + Option + Power for 10 seconds

3. Release all keys and turn on Mac

For Apple Silicon Macs:

• Simply restart your Mac – SMC resets automatically

• Use Terminal commands to reset sleep settings (see below)

Software-Based Solutions

1. Adjust Power Settings

• Go to System Settings > Displays > Advanced

• Toggle “Prevent automatic sleeping on power adapter” off/on

• Navigate to System Settings > Battery > Options

• Toggle “Wake for network access” off/on

2. Reset Sleep Settings (Apple Silicon)

1. Open Terminal (Applications > Utilities)

2. Enter these commands:

   bash

   sudo pmset -a disablesleep 1
   sudo pmset -a disablesleep 0

3. Restart your Mac

3. Boot in Safe Mode

1. Shut down your Mac

2. Hold power button until “Loading startup options” appears

3. Select your drive, press Shift key, click “Continue in Safe Mode”

4. Test if screen wakes normally in Safe Mode

Display-Specific Fixes

1. Check Display Settings

• System Settings > Displays

• Disable “True Tone” temporarily

• Adjust brightness settings manually

• Turn off “Automatic graphics switching” (if available)

2. External Display Test

• Connect an external monitor or TV

• If external display works, issue is with internal display drivers

• This helps isolate the problem source

System-Level Solutions

1. Update Software

• Check for macOS updates: System Settings > General > Software Update

• Ensure all available Tahoe updates are installed

• Check for firmware updates

2. Reinstall macOS Tahoe

1. Back up your data using Time Machine

2. Restart and hold power button until startup options appear

3. Select Options > Continue to enter Recovery Mode

4. Choose “Reinstall macOS” and follow prompts

5. This refreshes system files without deleting data

Third-Party App Conflicts

Identify Problematic Apps:

• Boot in Safe Mode (as described above)

• If issue resolves in Safe Mode, third-party app is likely causing conflict

• Uninstall recently added display, brightness, or power management apps

• Check for kernel extensions affecting display

Prevention Tips

Optimal Settings:

• Keep “Prevent automatic sleeping on power adapter” enabled when plugged in

• Use Apple menu > Sleep instead of closing lid for testing

• Maintain adequate storage space on your Mac

• Restart regularly to clear temporary glitches

Maintenance:

• Keep macOS and all apps updated

• Regularly restart your Mac

• Monitor system performance

• Maintain backups

FAQ

Is this a hardware or software issue?
Mostly software-related, caused by macOS Tahoe’s power management changes.

Will I lose data with these fixes?
No, these solutions don’t erase personal data. Always backup before major changes.

How long should I wait for the screen to wake?
If no response after 30-60 seconds, proceed with troubleshooting steps.

Can I downgrade to previous macOS?
Yes, through Recovery Mode, but backup first and be aware of compatibility issues.

When to Contact Apple Support

• All software solutions fail

• Hardware damage suspected

• Under warranty or AppleCare+

• Consistent display issues across multiple macOS versions

Conclusion

Most macOS Tahoe screen wake issues can be resolved through power setting adjustments, system resets, or Safe Mode troubleshooting. The combination of resetting sleep settings and ensuring proper power management typically resolves the problem. If issues persist, reinstalling macOS or waiting for Apple’s next update often provides the final solution. Regular maintenance and updates can prevent recurrence of these sleep/wake problems.