Sleep Wake Failure with High Sierra 10.13.4

Since installing 10.13.4 on both of my iMacs, I have noticed a Sleep Wake Failure on my 2012 iMac.


Once it has gone to sleep, it will display the log in screen, I enter my password and it will hang. The only solution is to hard reset the system, where it will "bong" twice before presenting me with the login screen (NB: It is File Vault enabled).


This did not happen until I installed 10.13.4 prior to that it was working perfectly.


I don't seem to get this error on my 2017 iMac.

iMac (27-inch, Late 2012), macOS High Sierra (10.13.4), FileVault enabled

Posted on Mar 31, 2018 2:15 AM

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Posted on Apr 4, 2018 10:58 AM

Are you using FileVault?


From my tests, it seems that 10.13.4 cannot wake up properly if your disk is encrypted with FileVault. 😟 The result is a black screen if you wake by keyboard or mouse (or rarely a non-responsive login screen).


If you press the power button to wake instead of using the keyboard or mouse, the iMac will turn on, turn off, then turn on again to perform a cold boot.


With FileVault turned off, it wakes perfectly every time.


Anyone on 10.13.3 reading this: if you need disk encryption, do not install the 10.13.4 update!

126 replies

Apr 3, 2018 6:51 AM in response to Batfink1983

I am having the same issue with my 2017 iMac. It started right after installing Mac OS High Sierra 10.13.4. Instead of sleeping, it goes into a sort of comatose state. When I try to wake my iMac, I get a black, unresponsive screen. At this point, I have to use the power button to do a hard reboot.

Other times I get a log in screen, but the mouse and keyboard are unresponsive, so I have to do the hard reboot anyway.

Apr 7, 2018 11:16 PM in response to RecheTech

Same problem here on an iMac 5K 2017. I did the upgrade and now when I sleep the device it can wake up for a few seconds but, predictably, will not wake up after prolonged sleep when hitting keyboard. Only solution is to touch the power button - after which the machine promptly reboots.


And I have filevault activated.


Apple, how could you release a supplemental update so injurious to basic encryption functionality in your new computers? Do you not test this stuff before releasing it?

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Sleep Wake Failure with High Sierra 10.13.4

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