Comments on: Determine Why Your Mac Wakes Up From Sleep

By: How to Tell If Someone Was Using Your Mac

How to Tell If Someone Was Using Your Mac — Sun, 21 Apr 2013 02:26:20 +0000

[...] of the time since that alone can give you the information you’re looking for. Furthermore, by reading the wake reasons you’ll be able to see how the Mac was woken up and by what method. For example, Mac laptops [...]

By: Billy Gard

Billy Gard — Sat, 30 Mar 2013 14:14:02 +0000

My computer is a macbook with Leopard 10.5.8. Nothing is connected to the machine except a power supply. No bluetooth devices are present.

In the middle of the night I heard the disk making its humming sound when the lid was closed. The computer woke. When I opened it the screen stayed blank, like the computer crashed in some weird way. So I did a cold reboot. It did a Hum-Hum-Chime sequence twice before successfully rebooting.

In a previous situation the computer woke while closed, and the fan was running furiously as if it were hot. It had to be rebooted then as well.

The “Wake for ethernet network administrator access” is set, but nothing is plugged in the ethernet. Something would have to wake it up through the airport.

By: Sheldon

Sheldon — Sat, 16 Feb 2013 06:24:00 +0000

I was having this same problem and the wake reason that I was getting was XHC1, which appears to be related to the USB ports on my MacBook Pro. In my case, the culprit was a hard drive docking station that was turned on, but did not have a hard drive plugged into it at the time and was not making any noise so I had no idea it was still on. I also had no idea that it would try to communicate so actively with my computer. I hope this saves somebody out there and a lot of frustration.

By: terry

terry — Mon, 03 Dec 2012 04:37:14 +0000

Thank you so much for this post, finally solved that problem w my MBA, now all i have to do is remember to unplug my usb hub Before I close the lid!

By: cmcc

cmcc — Sat, 13 Oct 2012 17:33:10 +0000

Thanks for this post, just wanted to post in case it helps others out.
I had the same problem with an early 2009 Mac Pro.
The problem turned out to be an extra keyboard that I had connected directly to the back USB ports of the MAC.

By: Sam

Sam — Wed, 19 Sep 2012 07:40:34 +0000

For other’s reference, USB devices include iSight, IR port (remote IR receiver), keyboard and trackpad, and bluetooth.
My Core Duo macbook has USB7 wake reasons which can be cross referenced with the USB section of the Apple Utility “System Profiler”. Look through the USB bus sections until you see Bus Number 0x7d for example. In my case this is the bluetooth module which is failing and giving weird on/off issues and of course making the computer wake up. Might have to remove or found out how to disable this…

By: Anic297

Anic297 — Mon, 30 Jul 2012 12:03:25 +0000

Do like me: avoid the Terminal and search in the Console. Why wasting time with so abstract things that are Unix commands?

By: Anic297

Anic297 — Mon, 30 Jul 2012 12:02:08 +0000

You have to remember Bluetooth (among others) is also connected to USB internally.

By: Anic297

Anic297 — Mon, 30 Jul 2012 11:55:27 +0000

UHC3 is one USB port of your Mac. If you install Apple Developer Tools, you’ll have two apps for figuring out which it is. I don’t know of any other way to discover that (even System Information doesn’t tell).

By: Jase

Jase — Sun, 17 Jun 2012 11:24:42 +0000

I’ve having the same problem as you John, did you find a solution to this?

Thanks

By: Guest

Guest — Sun, 17 Jun 2012 06:11:34 +0000

Mac OS X 10.4, doesn’t work.

syslog does provide a log, but it doesn’t have any entries for “wake reason” even during the time when it did wake up.

By: John

John — Fri, 01 Jun 2012 04:21:50 +0000

I’m running Terminal and it’s telling me “: Wake reason = USB7″ or sometime with “USB4.” However, I have no USB elements plugged into my laptop. Any ideas, people?

By: Patching DSDT Gigabyte GA-Z68P-DS3 (rev.1)

Patching DSDT Gigabyte GA-Z68P-DS3 (rev.1) — Mon, 06 Feb 2012 20:25:59 +0000

[...] the wake reason is. In Lion the terminal commando is: syslog | grep -i "wake reason" Determine Why Your Mac Wakes Up From Sleep Tell us how you install? Retail? Which extra kexts are you using? Maybe you need a clean install? [...]

By: allan

allan — Fri, 13 Jan 2012 04:48:09 +0000

Ok, nvm, it worked with

syslog | grep -i “wake reason”

HOWEVER, I’ve found that EHC could also mean when your macbook is with the lid open and in sleep mode. When you press any button and it wakes up, thats going to show up in the logs as EHC2.

By: allan

allan — Fri, 13 Jan 2012 01:53:59 +0000

NONE of the commands work on lion!!! I’m desperate!!!

All of them give me no response or the no file in directory thing.