IMac Pro refuses to sleep with 10.13.4

Three comments on the constantly waking from sleep problem with the iMac Pro. (1) I have an iMac Pro 10-core, 128 GB RAM, 2TB SSD, Radeon Vega64 Pro (16 GB) that began repeatedly waking up after the 10.13.4 update. (2) After hours of trying to resolve this issue, I checked Console>Mac analytics to see what was going on that was initiating these wakeup sleep cycles and found that it was my ethernet network even though I did not have Wake for Network Access checked in Energy Preferences. I Googled the exact wake error found in console and dsicovered

that many others were reporting this issue and the only solution was to disconnect the wired ethernet and use a wireless connection. When one does this the constant wakes from sleep cease immediately and sleep works perfectly on my iMac Pro. (3) the latest OS update (10.13.5) does NOT solve this problem.

This problem has been submitted as a bug report to Apple by others at least two months ago (and by me) and Apple has done nothing to resolve the issue which leaves the 10 GB ethernet port on the iMac Pro useless if you ever want to put the computer to sleep.

I urge those of you who have not done so to submit a bug report to Apple and hopefully one day Apple will decide that the iMac Pro is worth supporting and fix this issue which they themselves created in the 10.13.4 update.

Tom

I tried reconnecting wired Ethernet after updating to 10.13.5 and my iMac Pro would never stay asleep until I disconnected the wired Ethernet and went to a wireless connection. Note that Traeton Garl1 also reported above that updating to 10.13.5 did not solve the problem for him. Unless you have external hard drives with activity lights or external raid arrays connected you may not realize that your iMac Pro has not gone to sleep because when you select sleep the screen does go dark but external HD’s just spin down and then 1-2 seconds later spin back up and repeat this behavior indefinitely while the display remains dark showing the iMac Pro has not remained asleep and Console clearly shows that wake from sleep is being initiated by the network even though ”wake for network acess” has not been checked. If updating resolved this for you, I am happy for you but it did not do so for me and at least one other person posting to this thread.

Glad to hear that your iMac Pro has been repaired and is working properly. A wired ethernet connection on the iMac Pro is not a problem until one hooks up a raid system via Thunderbolt 3 externally. I have a Promise Pegasus3 R6 raid hooked up to my iMac Pro via Thunderbolt 3. With a wired ethernet connection every time I put the iMac Pro to sleep, it goes to sleep for about 1-2 seconds, then wakes up, and the cycle starts all over again. Others with raid external systems connected via Thunderbolt 3 have also reported this problem earlier in this thread. One can use Console to see that the problem is clearly wired ethernet and can prove this by disconnecting the ethernet cable and noting that their system will then go to sleep and stay asleep. Apple appeared to acknowledge the problem when I reported it on the Developer web site, but have to date not fixed it in High Sierra even though they created it in the 10.13.4 update.

Tom

Is yours connected via ethernet by chance? Mine is doing the same thing, I've narrowed it down to something with the ethernet connection. If I keep my iMac Pro connected then it wakes like every few seconds after sleeping, I can watch the light on the router's port and the system log supports the theory. If I unplug the ethernet cable from my iMac Pro, and just keep it on WiFi, it will sleep properly. Now I'm trying to figure out what the issue is when it's hardwired to the router. I have PowerNap off, Wake for Network off. I don't have any external drives connected to it.

I filed a bug report on the Apple Developer web site. Eventually I heard from Apple that this issue should be resolved in the MacOS Mojave release this fall. I was asked to install the beta of Mojave, but I refused since I use this iMac Pro for business purposes and I do not want beta software on it. This problem still exists in OS 10.13.6 and the only solution is to disconnect the ethernet cable and use the iMac Pro wirelessly. Apple created this problem in the OS 10.13.4 update but they seem either unable or unwilling rot resolve it until a new OS is released. We can only hope that OS Mojave resolves this issue. If anyone reading this who is experiencing this problem with their iMac Pro has installed Mojave can they please tell us whether Mojave does solve this problem.

Tom

I filed a developer bug report on this issue with Apple about three months ago. After collecting the usual logs, diagnostics, etc. I received a reply that this issue "should be" resolved in Mojave and I was directed to confirm that by downloading and installing the beta version of Mojave. I refused to do this since may iMac Pro is a production machine and I do not wish to have beta OS software installed on it. The issue has never been resolved in High Sierra and the only way that I can put my iMac Pro to sleep with my Pegasus3 R6 raid array attached is by disconnecting the wired ethernet connection and using the iMac Pro on a wireless connection. That is what I have been doing for the last three months. This is hardly the support that I expected from Apple for a $10,000+ computer.

If anyone is using the beta of Mojave, perhaps they will post and let us know if the issue is resolved in Mojave or not.

Tom

update to 10.13.5.

Got the same error. Waited two OS updates, still not fixed :/

Always got this wake reason:

localhost kernel[0]: (AppleTopCaseHIDEventDriver) [HID] [ATC] AppleDeviceManagementHIDEventService::processWakeReason Wake reason: Host (0x01)

Machine wakes up immediately, 2 sec after sending to sleep. Can't find any more precised meaning for the wake reason "Host" at the internet.
You say its something with the network card (this one again, after the 200GB copy bug)?
I should try wireless or a USB NIC, until this will be fixed (if Apple has capacities and an eye on that, not only for Mojave).

I'm still having this issue with 10.13.6. iMac Pro with 2 x LaCie 6Big T3 RAID units attached, each with their own cable. Wake for network access and Power Nap are both off, but the RAID units spin up again within a few seconds of sleeping (the screen stays dark). This is resolved, as others have found, by unplugging the ethernet cable but this isn't ideal.

Has anyone found a solution or tried the Mojave beta?