Mini hibernates despite pmset saying it shouldn't
Hello. My new (late 2012) Mac Mini is great, but I've noticed that after putting it to sleep, an hour later it wakes again (although not the displays) to write everything in memory to disk. I'd rather turn this off (it seems a bit pointless given I have 16GB RAM and it just creates a ~20 or so pause when I start the Mini up again whilst it reads everything back off the disk. Also if I did ever have a power cut, there'd be just as much chance of it happening whilst I was actually using the computer as when it was sleeping, so...)
Anyway, the output below says 'hibernatemode' is set to zero, which from everything I've read suggests it shouldn't be using it.
wt-macmini:~ wt$ pmset -g
Active Profiles:
AC Power -1*
Currently in use:
standby 1
powerbutton 1
womp 0
autorestart 0
hibernatefile /var/vm/sleepimage
networkoversleep 0
disksleep 10
sleep 180
autopoweroffdelay 14400
hibernatemode 0
autopoweroff 1
ttyskeepawake 1
displaysleep 30
standbydelay 4200
Any suggestions?
Thanks,
William