27" iMac won't wake from sleep

[GGJstudios]

Please tell me what a BT mouse & keyboard stans for?

I hope you're not waiting for a response from fredsout because fred's out! That 2 year old post was the only one made by that poster, who hasn't been on this site since then. BT = Bluetooth.

 

[Choctaw]

I hope you're not waiting for a response from fredsout because fred's out! That 2 year old post was the only one made by that poster, who hasn't been on this site since then. BT = Bluetooth.

I was not waiting for fredsout to respond....just anyone (including you) to explain what BT means. Thanks for the answer...yes I did note a bit of that analytical response which is emblematic of your domineer when you find one of my post that is not agreeable with your way of stating things. It is always nice to have someone watching over my shoulder making sure that I get it right.

 

[GGJstudios]

I was not waiting for fredsout to respond....just anyone (including you) to explain what BT means. Thanks for the answer...yes I did note a bit of that analytical response which is emblematic of your domineer when you find one of my post that is not agreeable with you way of stating things. It is always nice to have someone watching over my shoulder making sure that I get it right.

I didn't say that anything about your post was disagreeable in any way. I simply pointed out... in a fun way, using a play on the poster's name ... the fact that it's unlikely that poster would respond, in case you hadn't noticed the date. Try not to be so sensitive. I'm not criticizing you or attacking you in any way.

 

[Choctaw]

Try not to be so sensitive. I'm not criticizing you or attacking you in any way.

Likewise I am not attacking or criticizing your response either. We are all here to learn and be nice to each other. Just commenting on your commenting. I am just an old fellow with some health issue in my life and enjoy looking over the forum and viewing the many responses and the way people post them. We are so lucky to have this means of asking questions and giving opinions. I know you are sincere in most of your work here and very helpful to our members. Me.... I am just passing the days and trying to enjoy the benefit of acquiring some knowledge. The process of which takes my mind away from worry and health concerns. God Bless

 

[evangw]

If someone again has this problem like mine where it will work properly in safe mode (hold shift on startup) but not in regular mode after upgrading to 10.7 Lion, I was able to fix it without making a completely new partition, but it's not for the faint of heart and probably should be done by someone who has a handle on command line (I had to rescue my system by booting up in single user mode).

I moved all my kernel extensions in /System/Library/Extensions to a "Disabled" folder, then ran the Lion installer again. DO NOT DELETE the kernel extensions, in case you restart or otherwise screw up. If you just move them and then restart, your system will not boot normally, but you can boot into single user mode and then mv the extensions back into their proper place. This is very important for Lion, since you need to have a working copy of 10.6.8 (or 10.7) to run the installer.

Running the Lion installer again did not work before I went all General Sherman on the kernel extensions folder and then did a 3rd installation, so I guess one of those extensions must have gotten corrupted during the installation somehow, and it was not replaced when Lion did an "upgrade" rather than a "clean install."

 

[Ralphgleek]

I have tried everything. Reset the SMC, reset the PRAM, reseated the RAM, reloaded the OS, tried both the wifi and USB keyboards, tried a number of energy settings. All to no effect. The only way to wake the 27" from sleep is to switch off at the wall and wait 15-20 seconds before switching back on again. However, I found the problem goes away when the USB network is disconnected. As this is a new iMac I am still using my USB 2.0 network. Either it is a cable, the hub or an external drive that is connected. The problem exists 100% of the time if the drive is connected, it is intermittent if the network is connected. So I have ordered USB 3 cables, hub and enclosure for the drive. Hopefully this is the remedy.

 

[mlfowler]

Keyboard Won't Wake iMac

My iMac also occasionally times out of working to awaken from a keyboard tap. When this happens, often after some app updates, I have to "Repair Disk Permissions" (Applications->Disk Utility->Hard Drive Disk Image->Repair Permissions) and then the bluetooth peripherals work fine to wake up the iMac.
I have no idea why. I enjoy reading the details on the repairs as they're being made, but I do not know how they had been "broken" or why, nor how they were being fixed.
All I know is that the problem is solved till next time. I must have originally heard this solution in this forum.

 

[Ralphgleek]

Solution

In my last post I mentioned I had tried everything. Reset the SMC, reset the PRAM, reseated the RAM, reloaded the OS, tried both the wifi and USB keyboards, tried a number of energy settings. All to no effect. The only way to wake the 27" from sleep is to switch off at the wall and wait 15-20 seconds before switching back on again. However, I found the problem went away when the USB network was disconnected. As this was a new iMac I was still using my USB 2.0 network. Either it was a cable, the hub or an external drive that was connected. The problem existed 100% of the time if the drive was connected, it was intermittent if the network is connected. So I have ordered USB 3 cables, hub and enclosure for the drive.

I installed a 15ft USB cable, a 7 port USB 3 Anker hub and a USB enclosure for my existing drive. Since installing these several days ago, I have not turned my Mac off and it has woken from sleep every time. In fact every time I see that my mac is asleep I wake it just for the fun of seeing it wake properly. If the non waking issue appears again I will let you know.

 

[Ralphgleek]

Two weeks later and problem has gone completely

In my last post I mentioned I had tried everything. Reset the SMC, reset the PRAM, reseated the RAM, reloaded the OS, tried both the wifi and USB keyboards, tried a number of energy settings. All to no effect. The only way to wake the 27" from sleep is to switch off at the wall and wait 15-20 seconds before switching back on again. However, I found the problem went away when the USB network was disconnected. As this was a new iMac I was still using my USB 2.0 network. Either it was a cable, the hub or an external drive that was connected. The problem existed 100% of the time if the drive was connected, it was intermittent if the network is connected. So I have ordered USB 3 cables, hub and enclosure for the drive.

I installed a 15ft USB cable, a 7 port USB 3 Anker hub and a USB enclosure for my existing drive. Since installing these several days ago, I have not turned my Mac off and it has woken from sleep every time. In fact every time I see that my mac is asleep I wake it just for the fun of seeing it wake properly. If the non waking issue appears again I will let you know.

I'm happy to report since upgrading my USB network (cables, hub and drive) to USB3 over two weeks ago, my Mac has started every time. It has only been shut down once because of a software update.