There can be various reasons why your Mac is not waking up from sleep. Let’s explore some possible causes and solutions to this issue.
1. Hard shut down and restart your Mac:
Sometimes a simple restart can resolve the sleep or wake failure on your Mac. Press and hold the power button until your Mac shuts down completely, then turn it back on after a few seconds.
2. Reset the System Management Controller (SMC):
The SMC controls various hardware functions on your Mac, including power management. Resetting the SMC can often fix sleep or wake issues. The procedure to reset the SMC varies depending on the Mac model. You can find the specific steps for your Mac on Apple’s support website.
3. Reset the Non-Volatile Random Access Memory (NVRAM):
The NVRAM stores certain settings on your Mac, including display resolution and volume settings. Resetting the NVRAM might help resolve sleep or wake problems. To reset the NVRAM, shut down your Mac, then turn it on and immediately press and hold the Option, Command, P, and R keys until you hear the startup sound for the second time.
4. Boot your Mac in Safe Mode:
Starting your Mac in Safe Mode can help diagnose and fix various issues, including sleep or wake failures. To boot into Safe Mode, shut down your Mac, then turn it on and immediately hold down the Shift key until the Apple logo appears. If your Mac wakes up properly in Safe Mode, it indicates that a third-party software or driver may be causing the problem.
5. Run First Aid in macOS Recovery:
If the above steps didn’t resolve the issue, it’s worth checking the startup disk for any errors using the First Aid feature in macOS Recovery. To access macOS Recovery, restart your Mac and hold down Command + R until the Apple logo appears. Then, choose Disk Utility and select your startup disk. Click on the First Aid button to check and repair any disk errors.
If none of these solutions fix the sleep or wake failure on your Mac, it may be necessary to seek professional assistance from an Apple Authorized Service Provider or contact Apple Support directly. They can provide further guidance and help diagnose any underlying hardware issues.
In my personal experience, I have encountered sleep or wake issues on my Mac and found that a combination of resetting the SMC and NVRAM, as well as running First Aid on the startup disk, resolved the problem. However, every situation can be unique, so it’s important to try different solutions and consult professional support if needed.
Remember to always keep your Mac’s operating system and software up to date, as Apple often releases updates that address known issues and improve system stability.