Apple Event: May 7th at 7 am PT
I did the update 2.0 today and I noticed that hibernate mode has been set to enabled. So I deleted the /private/var/vm/sleepimage and disable hibernatemode like this :
sudo pmset -a hibernatemode 0
But the problem is that hibernate mode is automatically set to 3 when I shutdown my macbook air or I reboot it. Anyone has the same issue ?
MacBook Air (13-inch, Mid 2012), OS X Mountain Lion (10.8.2)
Ok so I managed to solve my problem. Basically, I couldn't prevent the sleepimage to rebuilt even though my hibernate mode is set to 0, I don't know why but now my sleepimage weights 0 byte instead of 8 gigs. Here's the deal :
First, disable hibernation mode :
sudo pmset -a hibernatemode 0
delete /private/var/vm/sleepimage :
sudo rm /private/var/vm/sleepimage
create an empty file and name it 'sleepimage' :
touch /private/var/vm/sleepimage
change his flag to immuable :
chflags -uchg /private/var/vm/sleepimage
That's it ! Now, OS X won't be able to rebuilt over your sleepimage file since it is locked. This one worked for me, hope it'll work for those who encounter the same problem as mine.
Hi hkim823,
To reverse the above last command you would place a "no" in front of schg i.e. ....and that would reverse the change?
change his flag to immuable :
chflags noschg /private/var/vm/sleepimage
Is that correct?
I found that after upgrading to 10.8.5, my Macbook Pro Retina started to take 20 seconds or so to go to sleep. Like this thread explains, it seems to be because the hibernateflag is now ignored by the OS .. I tried both suggestions here (chflags and /dev/null), and those both prevent the sleepimage from being created, but going to sleep still takes just as long. Very frustrating!
I solved my problem .. I found this article "Addressing slow sleep times in OS X"
http://reviews.cnet.com/8301-13727_7-20077964-263/addressing-slow-sleep-times-in -os-x/
I tested sleep after each step, and it went back to normal after resetting PRAM with Option-Cmd-P-R during boot chime. I will never know what caused it or exactly why PRAM needed resetting.
[I had already reset the SMC after the 10.8.5 update as the system kept freezing for seconds at a time right after the update. And I was under the impression Apple OS X computers were more stable than Windows boxes ... This is my first Apple computer after way too many years with Windows. I will reset both SMC and NVRAM after all system updates from now on]
Thanks a lot! This is the true solution.
Theoretically yes but actually you have to get into the single-user mode to get the required user level in order to really perform noschg, otherwise you'll get "operation not permitted". See this post: http://superuser.com/questions/117944/unset-the-system-immutable-bit-in-mac-os-x
Hi guys,
I have done this routine about 4 times now. As soon as my macbook air goes back into hibernation mode it immediately fills up 8gb of hard drive space leaving me a gig to keep my head above water!
Any clues?
Thanks for your help thus far.
Stephen
This is what's happening now when I put the last two commands in Terminal:
Stephens-MacBook-Air:~ stephen$ touch /private/var/vm/sleepimage
touch: /private/var/vm/sleepimage: Permission denied
Stephens-MacBook-Air:~ stephen$ chflags -uchg /private/var/vm/sleepimage
chflags: illegal option -- u
usage: chflags [-fhv] [-R [-H | -L | -P]] flags file ...
Stephens-MacBook-Air:~ stephen$
Unable to disable hibernatemode since update 2.0
