Since upgrading to the first stable release of Mac OS X Yosemite a few days ago, my Mac Mini wakes up roughly every two hours from sleep for about a minute, then goes back to sleep. This is particularly annoying at night since I sleep my Mac, and it's in the bedroom, so I notice when it turns on.
In my Console, here's some of the lines from it from when it wakes up:
14/10/19 6:48:06.000 am kernel: Wake reason: RTC (Alarm) 14/10/19 6:48:06.000 am kernel: RTC: Maintenance 2014/10/19 10:48:06, sleep 2014/10/19 09:00:12 14/10/19 6:48:06.001 am SyncServer: [0x7fdd69c19d80] |SyncServer|Warning| Refreshing watchdog because of a calendar time change alert. 14/10/19 6:48:06.000 am kernel: Previous sleep cause: 5 14/10/19 6:48:06.000 am kernel: AppleThunderboltNHIType2::prePCIWake - power up complete - took 1 us 14/10/19 6:48:06.000 am kernel: The USB device USB 3.0 HUB (Port 1 of Hub at 0x15000000) may have caused a wake by issuing a remote wakeup (1)
From the last line, yes, I've got a USB 3 hub plugged in to my USB 3 port on the Mac. But there are no devices plugged into the hub. Nevertheless, I'll try unplugging it tonight, but I suspect it won't make a difference.
Also, I've already disabled "Wake from network access", disabled "Power Nap", and pretty much disabled everything else in the "Energy Saver" system preferences pane.
When I run
pmset -g, I get:
Active Profiles: AC Power -1* Currently in use: standby 1 Sleep On Power Button 1 womp 0 autorestart 0 hibernatefile /var/vm/sleepimage darkwakes 0 networkoversleep 0 disksleep 0 sleep 0 (sleep prevented by iMovie, coreaudiod, iTunes, AddressBookSour) autopoweroffdelay 14400 hibernatemode 0 autopoweroff 1 ttyskeepawake 1 displaysleep 60 standbydelay 4200
I often have wake problems with my Mac, especially after upgrading to a new OS, and this time is no exception: