Sleep Wake Failure on macOS Mojave (Fixed)


Many apple Users have a complaint that they have sleep wake failure issue on their Mac. they said this problem occurred after updating macOS Mojave. Here I am going to tell you the solutions to fix sleep wake failure on Mac Mojave.
Solution 1: Hard Reset

  1. Press and hold the Power Button until your Mac Turned off.
  2. Then turn on your Mac.

Solution 2: Reset SMC
If your Mac has a non-removable battery,

  1. Shut down your Mac by pressing the Power Button.
  2. Press and hold the Shift + Control + Option + Power Button simultaneously.
  3. Then release the keys at the same time.
  4. Press the Power Button to turn on your Mac.

If your Mac has a removable battery,

  1. Remove the battery out of your Mac.
  2. Press and hold the Power Button for 5 seconds.
  3. Insert the battery into your Mac.
  4. Turn on your Mac.

Solution 3: Turn off FileVault

  1. Go to Apple Menu->System Preferences.
  2. Click “Security & Privacy” icon.
  3. Select “FileVault” tab.
  4. Click the lock icon to unlock.
  5. Enter your User Name & Password and then click “Unlock”.
  6. Click “Turn Off FileVault”.
  7. Click “Turn Off Encryption”.

Solution 4: Turn off “Power Nap”

  1. Go to Apple Menu->System Preferences->Energy Saver.
  2. Select Battery tab.
  3. Deselect (untick) “Enable Power Nap while on battery power”.
  4. Select Power Adapter tab near to Battery tab.
  5. Deselect “Enable Power Nap while plugged into a power adapter”.

Solution 5: Reset PRAM/NVRAM

  1. Press and hold the Power Button until your Mac turned off.
  2. Press the Power Button to turn on your Mac.
  3. Then immediately press and hold the Option + Command + P + R keys simultaneously as quickly as possible after pressing the Power Button.
  4. Keep pressing those keys until you hear the startup sound for the second time.
  5. Wait for some time. Your Mac may take 15-20 minutes to restart.
  6. Then your mac will restart normally.

Solution 6: Restart your Mac in Safe Mode
Restarting your Mac in Safe Mode will fix many issues in the Mac. But you can’t use some features in Safe Mode.

  1. Turn off your Mac via Apple menu->Shut Down.
  2. Press the Power Button to turn on your Mac.
  3. Press and hold the Shift Key immediately after pressing the Power Button.
  4. You can see the Apple Logo on the screen. Don’t leave the Shift key when you see the Apple Logo.
  5. Keep pressing the Shift Key until you see the Login Window.
  6. Select your User Account and then enter the Password to login. You may need to login twice if FileVault is turned on.

Note: If it doesn’t workout, leave safe Mode and then try next solution. To leave Safe Mode, restart your Mac via Apple menu->Restart. Wait until your Mac restarts.
Solution 7: Reinstall Mojave

  1. Press and hold the Power Button to turn off your Mac.
  2. Press the Power Button to turn on your Mac.
  3. Press and hold the Command + R keys simultaneously as soon as possible after pressing the Power Button.
  4. Keep pressing Command + R keys until the Apple Logo appears.
  5. After that macOS Utilities window will appear with 4 options. Tap “Reinstall macOS”.
  6. Tap “Continue”.
  7. You will be prompted to choose your hard disk/drive. If you are not asked to select your disk, tap “Show All Disks”. You may need to enter your Apple ID.
  8. Tap “Install”. Wait until the installation process is completed.
  9. Your Mac will restart after completing the installation.

Other Solutions:

  1. Use another user account and then check whether this issue occurs or not.
  2. Downgrade Mojave.

If you know any other solutions to fix MacBook Pro macOS Mojave sleep wake failure, let us know through your comments.

9:24 am

2 responses to Sleep Wake Failure on macOS Mojave (Fixed)

I had this problem and did everything everyone suggested including a clean reinstall. I have found a solution, or at leasts a work around. I put Develop on show on the safari bar (Enable the Develop Menu
Choose Safari > Preferences, and click Advanced.
At the bottom of the pane, select the “Show Develop menu in menu bar” checkbox.
Choose Develop > Show Web Inspector.) And about once a day or at most every other day I empty the caches. I have no idea why this works, but it does for me. And if I forget to empty the caches I immediately begin to get the grey screen instead of a wakeup.

Randomly emptied cache three nights ago. Did not get the 3am wake-me-up–from-sleep reboot for the next two nights. Had been getting it nearly every night previously. This afternoon — about three days after the cache emptying — i got a spontaneous reboot again.
Am going to start regularly emptying cache, to check out if this solution works. It has a great chance of being the simple procedure we've been seeking to prevent this dreadful happening.
Merilyne Waldo, you are to be heartily congratulated for discovering this AND for sharing this. Thank you !!

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