iMac not waking up from sleep after Yosemite upgrade

I tried closing every open app but this issue still remained.

I have had a reply from LaCie. They have suggested:

1. Try with the drive attached via the USB3 cable. I've just done this so wait and see.
2. Try on a different Mac. Tried this on my MBP with no wake from sleep issues.
3. Try with a different Thunderbolt cable. I don't have another cable, and at £25 a pop a costly experiment. I can't borrow one either as the only person I know who has Apple kit does not have TB. I suppose I could buy one at an Apple store, explain what's going on and take it back if it doesn't work.

Has anyone else tried any of these three suggestions, especially the last one?

Hi Jon,

Don't buy another TB cable, cause that's not the problem. I have two so that's not it. One thing I found out is that a super long TB cord causes all kinds of problems. I would be interested to know how the USB3 connection works.

I've been working with Apple Support for the last few days. Initially, they had me create another user account on my machine to see if the problem occurred with that account. It did not. Today, they were initially going to move everything over to that account, but instead ended up trying first to just recreate my Library folder in my original account. We then ported my mailboxes and bookmarks back over out of the old library.

The tech did not think the problem has anything to do with hardware or cables, but rather with a file corruption that occurred sometime during the Yosemite upgrade.

I've said this before, but time will tell ... Hopefully this will resolve the problem for good. I'll keep y'all posted.

Keep us posted. I thought my problem was solved but it took two weeks to fail again.

Durrace: Thank you very much for the advice regarding buying another TB cable. More money for beer 🙂

I don't think it's a file corruption issue as I did a clean install of Yosemite last night. The chances of the same file(s) being corrupted during the initial install and the one last night must be minimal.

With only the TB drive attached, it didn't take long for the issue to reappear. In the 12 hours or so since reinstall; it's had 3 successful wake-ups and 2 failures.

A quick Google of "Sleep Wake failure experienced a problem" brings back a load of stuff. It seems that failure to wake from sleep is not confined to Yosemite.

Now trying the LaCie USB3 suggestion. As usual, I'll keep you posted.

It appears that you are correct re: it not being a file corruption issue. It took less than a day for the problem to recur yet again for me. 😟 Back to square one.

Bad news ... my iMac couldn't wake from sleep yesterday without the TB LaCie drive connected. I DO have a Buffalo drive (non-time machine) disk connect via TB ... so I don't know anymore. Apple's failure to fix the Wake from Sleep problem doesn't do them any credit! 😟

I only use my TB drive for occasional video editing. So for me it's more of an annoyance than anything else, but I would still like my expensive kit to "just work". So yes, not fixing the wake from sleep doesn't do them any credit. I would recommend that any WFS error reports are sent back to Apple. Perhaps I should reconnect my TB drive purely for it to crash and generate error reports 👿

USB3 connection has NOT caused any issues as yet, nor do I expect it to.

I spent more time on the phone with Apple and still haven't gotten further than sending them a log that I'm not even sure contains crash data since I wasn't positive about the time/dates of previous crashes. They also asked me to try swapping out the cables on my drives and trying USB vs. TB. In the meantime, though, I may have found a workaround that is so far allowing the computer to wake normally. Instead of letting the machine boot up with the drive turned on, I turned it on after booting. The machine has been waking normally for about 24 hours so far. Certainly not a real fix, but better than nothing.

Well, scratch that. It wouldn't wake and hard-booted again. :-(

Following LaCie's advice re trying USB3 etc I contacted them with the results. I also asked them to look at this thread to see what other users are saying. I have had a reply. Quote:

I have read every post in the Apple discussions link you've provided. Based on the symptoms described by the users it is indicative of a problem with Mac OS X and Thunderbolt. USB does not seem to have any bearing on whether the computer wakes or sleeps. Unfortunately the only solution I can offer at this time is to disconnect the drive when not in use. In order to address the problem the only suggestion I can recommend is to follow-up with Apple regarding the sleep wake issue. I apologize for any inconvenience this answer may cause you. I have taken the ticket information and forwarded it to our product engineering team to verify if the issue can be addressed by LaCie. If you have any questions please respond and I will be glad to provide additional help.

The penultimate sentence is interesting.

I still have an open ticket with Apple and will be contacting them in the next couple of days.

My opinion all along. Apple's problem to solve using dump info.

I think I've discovered where the issue is - Bluetooth. Turn this off and use a USB KB and USB Mouse. Leaving BT on, even with USB KB & mouse doesn't work.

I've tried this with an Apple USB KB and a really cheap USB mouse and all seems fine. Obviously, you are going to loose the magic mouse 'goodness', but for you guys using TB as Time Machine backups it may be the only option until Apple fixes this. For me, I will be using the magic mouse and only switching on TB when i need it. Hopefully, the comments I've supplied in the dump info will point their OS X people in the right direction.

I've also been speaking to an Apple tech guy as there was a possibility that either an Apple, or 3rd party app was causing this. This is not the case as I reinstalled Yosemite on a fresh partition with no other apps. Booting from this with BT KB and mouse caused a WFS failure within 10 minutes 😁

I will be emailing the tech guy soon with my "findings". Hopefully this, plus comments on the dump info, will get this issue fixed quickly.

Thanks! Not an option for me, as I use the BT trackpad on the 27" iMac, which gets the most out of OS X. I would rather power cycle the machine until a solution is found. Please hang in there with Apple getting them dumps after the WFS issues. Surely they have the expertise to fix the problem!?

I can't turn off bluetooth either since I use a BT keyboard and trackpad.

One interesting note to add: The Apple rep called yesterday and wanted me to change my energy prefs. When I went to wake the machine to do so, it would not wake up although the TB drive was off. 😕 In any event, he then wanted to totally rebuild the system from scratch and I refused pointing back to the need for the engineers to look at the dumps and figure out what is happening for all of us.