I have this problem, too, on my Mac Pro (Late 2013): I installed High Sierra (upgraded from Sierra) on October 6th. Ever since then, here is what happens: I leave my Mac running at the end of the work day. I come back to my office the following morning and the computer is unresponsive to trackpad or keyboard wakeup. My only option is to restart the computer.
I have reset SMC. I have downloaded and reinstalled High Sierra as of October 11th. I have upgraded my external monitor card drivers (Blue Diamond) to High Sierra compatible drivers. The system is still locked up on most mornings. The only thing that has changed is that after resetting SMC the monitors actually wake upon response to touching the trackpad or keyboard. But, that doesn't matter, because the actual operating system is locked up.
On October 11th, I opened a ticket with Apple support and have provided their engineers with a crash dump diagnostics file.
This behavior has happened nearly every day since installing High Sierra on October 6th. Although, curiously, the computer was awake and ready for business for me the past two days (October 15th and 16th) without incident...and without a change on my part.
I have just heard back today (October 16, 2017) from my Apple support contact who has confirmed that:
- Computers locking up is a known issue that is affecting many users who have upgraded to High Sierra.
- As such, research will continue and it will be addressed in a forthcoming operating system update.
Technology. It's great...when it works. #ahem
