IMac Pro refuses to sleep with 10.13.4

I filed a bug report of this spontaneous sleep-wake issue with Apple a few days ago. Today via the bug reporting system Apple followed up by requesting both a netdiagnose and sysdiagnose file be captured using terminal commands and sent to them. The former collects all the events occurring on the iMac Pro after wired ethernet is connected and sleep initiated followed by the spontaneous wake cycle. Clearly Apple is working to determine the cause of this problem and I appreciate their help. I will post further results and any solution as it develops.

Tom

Andy,

I am really sorry to hear that the OS beta version 8 did not resolve the problem of wired ethernet causing raid hard drives to wake from sleep repeatedly. I had been assured by Apple that this was fixed in Mojave and it is extremely disappointing that it has not been. At present the iMac Pro is Apple's most expensive and fastest computer and yet the only way that I can use the iMac Pro with my Pegasus3 R6 attached via Thunderbolt 3 is to disconnect the wired ethernet and connect via wireless. I cannot understand why Apple either cannot or refuses to rectify this issue which they themselves introduced with OS 10.13.5. At least in about two weeks we should get the final release version of Mojave and hopefully the issue will be resolved then.

Tom

Excellent. I have also filed a bug report with Apple and included my powermanagement log file. Hopefully we won't have to wait too long for a fix, as this seems to be a serious issue. I just hope this bug didn't unnecessarily wear down my iMac Pro's SSD for the 20+ minutes I thought it was "sleeping" by writing the contents of memory over and over again to the sleep image file.

I am also seeing this on my mac mini, I disconnected everything, turned of my modem/router, and shutdown all the running programs. Still didn't go to sleep properly. Power light that usually flashes in sleep mode stayed on and when I hit the spacebar it just turned on like the monitor was off, no password prompt.

I too am having a no sleep issue. I have a rather old iMac (27-inch, Mid 2010) which has been working fine and sleeping with no problems that is until I installed the 10.13.4 update and now the iMac will not sleep. However my Mac does not have the drives spin down and then wakes from sleep it just does not go to sleep. On asking the Mac to go to sleep the screen goes dark but nothing else happens I can still hear the disk and the fan. Sometimes the screen goes dark but then suddenly the screen shows the desktop again.

I have tried in a new user account, in safe mode, after resetting the NVRAM, after resetting SMC - I have even reinstalled the OS (all suggested by Apple support) but nothing has worked. No suggestion from the support guy that it was anything to do with 10.13.4 or that they had and other complaints regarding computers not sleeping.....

See my other posts for update on that my machine needed a new logic board and power supply, but anyway - as far as sleep, the external HD is supposed to keep working as far as Time Machine backup even when the iMac and its internal HDs are asleep, no?

And as far as what as_909 posted, he was observing the machine flat out wake up, not this sort of esoteric "screen went dark but it really wasn't asleep" mode that you observed.

From my experience, either the machine is asleep or it is not, there is no quasi sleep, and what the external drives are doing doesn't necessarily reflect the state of the iMac itself.

Got the same constellation, except the four disk Promise Pegasus3 R4 instead of the R6 model.
Same here. Has to shut it down or running (😠) since several High Sierra updates.
And this with a 'official' and advertised hardware addon for a mac.

Lets hope they will fix that in the near future - i'm sure many power user with a imac pro are having external disks and raid.
I'm so angry about the fact not being able to use the machine sleep function, to keep it runnung for nothing or to have to shut all down.

Hi Tom,

Thanks, and appreciate your reply.

I feel my issue is bit different from yours, as my issue do not resolve by disconnecting the ethernet connection from Imac pro.

I disconnected the ethernet, rebooted the imac pro with all external drive connected (Promise T3R4, G-Tech T3 2bay, Thunder3 RAID Station, Seagate 5Tb 2.5”, Samsung t5 ) and all wake up every 1-2 minuets with the screen off (dark).

I again called Apple support and after long talk they confirmed that they have not seen any information that this issue will be addressed in 10.14. but again I don’t trust Apple phone support as they have no clue what’s happening and they keep protecting apple interest by giving stupid response. They keep on saying to disconnect all external drive and see if this issue happens and if this happens its external to apple and they don’t take any responsibility for that.

I need your help to provide me how you contacted Apple developer site so that I can get the beta version of Mojave.

Thanks, and appreciate your support.

[Edited by Host]

Andy

Hi Tom,

I registered on the developer site and payed the subscription fees. Installed the Beta version. The bad news is, they did not fix the issue. Now my issue is consistent. With and without lan cable the issue does not resolve. To reassure, I wiped my whole Mac and reinstalled from scratch with the beta version 8. NO Luck.

Now I have new issue - using Adobe Pr or LR, system crash, Kernel panic, and wake up from sleep is fast but whole system hangs for 2-7 sec. You were very right, not to trust the beta version. I gave up on my $10K iMac Pro. production work migrated to Windows system.

Any one on this forum have similar issue with Beta 8 ?

Regards,

Andy

No, not at all. Please do submit a bug report. They really need to do something about this!