Q: After installing mavericks, the iMac will not wake from sleep properly (at all)

AW1960 said "The technician was of the opinion that Mavericks requires a clean install - there have been problems with upgrades.  I'd be interested if those experiencing problems installed Mavericks from scratch or applied the upgrade delivered via the App Store (which is what I did)."

That is a good point.  Most of the comments I can recall in this thread seemed to be for cases where the person had done an update over an existing earlier version.  I think there was at least one where the person said they did a clean install and, at least at that point they thought it had resolved the problem.

I would rather avoid a clean install because of concerns about how well a restore would work - both if everything would come back OK, and the time it would take in my case.

So, I am interested in the possibility of a reinstall over the current disk.  I am unclear if that is any more complete than the update that seems to have started all this.  (That is, I would expect a reinstall to have everything, but an update might not include some things that are assumed to be there from a prior version.)

Of course in looking at questions like these we need to remember that there could be more than one problem out there and they all find their way here to this discussion because they have a similar symptom - not waking in this case.

Just to add to my original post.  Over Xmas and the new year, I serviced a 6 month old iMac 27 and in the process updated from 10.8.5 to 10.9.1.  Lo and behold it has the same sleep issue now.  I disabled the displays have separate spaces in Mission control and unticked all the energy saver options but it is still there.  Before my customer collected, I did an SMC reset, so we will see what happens there . IMHO there appears to be something screwy with sleep and energy saver, as I have to untick everything in Energy saver for my Mac Pro Early 2008.  There does appear however, to be something specific to iMacs of whatever vintage which probably needs either a 10.9.2 or a fimware update.  I'm not upset, these things are bound to happen with a major OS upgrade and Apple has to get them out, because if it ironed out every little bug, it would never get published (Shame that none of the developers picked this up).  Lets hope Apple comes to the party soon.  Happy New Year.

Sure enough, I'm an idiot thinking resetting SMC, NVRAM, repairing permissions and editing Energy Saver settings would have fixed it; a couple weeks later and the problem is back.

The million dollar question is when the h e l l is Apple going to fix this issue. This all began with Lion and has never been addressed. SMDH.

I've been back in town a couple of nights now. My 10.9.1 sleep/wake is still working great as it should. From reading the other posts it sounds possible it won't last, I guess we will see.

I was close and stopped by an Apple store tonight; I talked to one of the geniuses. Nice kid, he checked their database “whatever that is” and found no references to this issue. I did show him this post on my phone and it was his opinion it was a very small percentage of Mavericks installs. He assured me there are people that continuously review these discussion boards and that he has met the people in the group. Ok sure, I could have been getting lip service but the kid seems credible… who knows?

I helped with the beta testing of 10.9.1 and not once did I experience a problem in waking the iMac from sleep. For me, the problem has only occurred since testing the new version. Today, fo rhte second day running, the iMac has woken up. As indicated earlier, I have removed all "problems" indicated by Etrecheck and disconnected all USB devices. I have set the automatic wake up function on; yesterday the iMac woke up too early, today I don't know as I only got to it late in the morning myself, but at least a single tap on hte spacebar woke it up again.

Just found this discussion. You are all obviously very knowledgable about computers, I am not a techy & would be afraid to try some of the fixes but it's good to know someone is trying to resolve this issue and I'm not the only one suffering with it.

These are my details, maybe my info might help with your puzzlings.

Computer won't wake after sleeping, I get a dark grey screen, I have to use the power button to switch off and on. Usually doesn't start the first time just get a light grey screen with no Apple logo so have to use power button again, sometimes several times, to get the computer to start up. OK once it's going though. I am very concerend this is all damaging my hardrive.

My iMac is old, 2008 and I downloaded Mavericks when it was released from the prompt sent by Apple from the App Store. Then updated to 10.9.1 on Dec 17th also from a prompt by Apple from the App Store and that's when the problem started. My computer is also slower since this update. Slower to start up and slower to load programs. I have to use power button to swtich off and on.

I have reported this as feedback to Apple using the link that one of you posted. Will keep a eye on this discussion to see if anyone finds a solution tough I really think it should be Apple who do that.

Further to my previous post, today my iMac did not wake up automatically, even though it is scheduled via Energy Saver to "Start or wake" Every Day at 10:00. Furthermore, it would not wake up by pressing a key on the keyboardor by clicking th etrackpad. Again, the hard disk seemed to be spinning, but the screen remained blank and no other response was evident.

Back to the drawing-board!

I'm having the same issues...since the10.9.1 update...

Interestingly, I have 10.9.1 installed on a MacBook Air (installed with update, not a clean install) and have no problems there whatsoever. Indeed, as I have already written, I had no problems at all with 10.9.1 on my iMac, only with 10.9.2.

hmmm...10.9.2???

I just wanted to point out that this only started happening to me 3 days ago. I have had mavericks installed for some time now. So i came to think what could be causing it what changed? And the only thing that did was that i got a new gaming keyboard that avtually supports macosx and comes with software as well. SteelSeries Apex Gaming keyboard is the model. So I ugraded the firmware for the keyboard today and I am going to do the pram reset to see if that has a longing effect.

Yes. See my post of 25 December.

BobHassinger:

My problems began after UPGRADING to Mavericks from the App store.

The "Genius" Bar guys decided that they should replace the system board because of my USB port problem (see pervious post if interested) but everything else (hardweare and software) "checked out" O.K.  They could not reproduce the wake from sleep isuue.  Even after explaining that it happens after the computer has been asleep for anywhere from an hour or more, they decided that it would be smart (hence the name "genius") to check it by resetting the computer to go to sleep after a minute and then to try to wake it up riught away.  They did this several times with no waking issues.

At my request, they are going to do a clean install of Mavericks.  I will have to reinstall EVERYTHING I have installed  as well as to copyt all of my documents back from a backup.  I sure hope this all goes well.

I will update after all of this happens and I see just how well the clean install works.

I'm in the same boat. I've got a late 2013 iMac 27" with Mavericks. I've tired everything reset SMC, etc. disabled sleep, cleared out the sleep cache, etc. nothing seems to work. I've two ASUS 23" connected via HDMI -> Thunderbolt and when the system goes to sleep, and attempt to wake it up, either the system goes to all black screens or the primary iMac monitor turns on and one of the two ASUS monitors turn on but, the system is non-responsive. The only way to get the systme back is a hard shutdown via power button, reboot and everything comes backup without issue. There have been other times when unplugging one of the thunderbolt cables reinitilizing everything but, that is unacceptable to me.

At this point, I'm using the "command, option, eject" to power off the monitors when I'm away from the computer. I've also disable sleep, and hard drive sleep. Tested this configuration last night, and the system was responsive this morning to waking up the monitors. I'm going to continue to test for the next few days and see if this method proves to be realible.

Question, has anyone tired a DVI -> Thunderbolt connection and have had better results? Been thinking about purchasing DVI -> Thunderbolt and see if this fixes the issue, and maybe, this is a HDMI issue only. Know Apple monitors the boards, but figured I'd throw my name in the hat with everyone else. Hope Apple will investigate, and find a solution. However, my research tells me this has been an on-going issue with Thunderbolt for sometime.