sleep wake problem with Yosemite on my Mac Mini Mid 2012

I confirmed through experimentation that making sure there is only one playback source on my Mac Mini (late 2012) with Yosemite solves my freeze on wake up. I moved my speakers (Bose 2.1) to my monitor and after waiting three hours, no freeze ups. I then moved my monitor to DVI and plugged in my speakers and after waiting over night, no freezes. I was able to enable Power Nap without any freeze ups. So, for my situation, making sure I do not have two audio output sources seems to fix my problem.

Saw this post yesterday as I am having the same issue with my Mac Mini in Yosemite with Bose external speakers. Unplugged my speakers from the 3.5 mm jack and tried to wake this morning with no problems at all. Unfortunately my monitor doesn't have sound output from HDMI, so I'm going to have to figure something else out to get my speakers back working again without using the jack. I may have to try to track down the DVI converter that came with the Mac Mini.

Thanks all for figuring out this problem, and let's hope Apple can fix this problem, know that the root caused seems to have come to light.

Same issue i think on waking from sleep on a mid 2011 mac mini here.

So far since upgrading to Yosemite I've had x2 freezes on waking from sleep, the mouse is moving on desktop but system completely frozen.

If you have two audio sources (e.g. HDMI and speakers plugged in to the headphone socket), try unplugging the speakers. I was able to get rid of the freeze by plugging the speakers into my monitor's speaker socket instead of the Mac Mini's headphone socket. It's important to not have more than one audio output showing in your audio preferences.

Ah ok I will just reading about the audio problem, I have headphones plugged into my headphone socket

and also HDMI to a monitor. So guess those two together are causing the problem.

Well, all the ports on my Mac Mini are in constant use except for the FireWire port, which I only use occasionally.

That's what the ports are for, isn't it? Am I not supposed to use as many of them as I feel like, any time? Are some of them just for decoration?

Having headphone plugged into my HDMI monitor messes my sound up completely.

I think I will have turn off sleep and keep headphones plugged into headphone socket.

Hopefully 10.10.1 update will sort the freeze/audio problem out.

At least there's hope. :-) I was able to switch my Monitor's HDMI connection to DVI using the Thunderbolt to DVI adapter that came with my Mini. This got rid of the HDMI audio output. I was then able to plug my speakers into the Mini's output socket. I know it's not optimal, but then your Mini can go back to sleep. :-)

I see a lot of people focusing on the 3.5 headphone port as being the problem but I am not so sure this is the case. I have a 2011 13" macbook pro connected to a monitor via hdmi, then a cable from the 3.5 headphone jack on the monitor connecting to my external speakers. I am having this sleep/wake problem also and I have nothing connected to the headphone jack on the macbook?

I'm having this issue as well. I don't even need my computer to go to sleep fully, simply having the display sleep or display power cycled will occasionally result in the "can move cursor around, can't interact with Mac in any way even remotely" situation. Only solution is to power cycle (yuck) using the physical power button.

I have a 2010 Mac Mini running Yosemite plugged into a receiver and then a TV using HDMI, and I use an Apple Wireless Keyboard and Magic Trackpad with it. I had zero problems under Mavericks with this kind of issue. I run a lot of weird random software on it like a VPN, a media server, etc. but this happens even with all of that turned off. It happens both with a Mavericks to Yosemite upgrade install and a bare USB drive Yosemite install.

Really looking forward to some remedy! 😢

This is definitely not a Mac Mini exclusive problem. I'm experiencing the exact same problem on my wife's late-2011 13" Macbook Pro. Speakers connected to 3.5mm audio out, HDMI display connected via display port to HDMI adapter. Unplugging audio out eliminates the wake-up crashes.

I may have to retract my last post!!! Although I said I was not using the 3.5 socket on my macbook pro, it is in a dock that jacks into the socket but does not connect to anything else.

I dont think the root cause is anything to do with the 3.5mm jack, maybe its just coincidence. Ive never had anything plugged into the 3.5mm jack, using audio over HDMI instead and my 2010 mini fails to wake up since Yosemite was installed.

The 3.5mm audio jack is far more than a coincidence. I have a 100% failure rate with it connected and a 0% failure rate with it disconnected. There may, of course, be other ways to trigger this bug, but at least one is directly related to use of the audio jack.

Same problem here with my 2012 Mac mini.

I was happy with Yosemite for a week until I plugged my speaker in the headphone jack.

I ran into the sleep wake problem 3 times in a afternoon.

Not very happy with this situation.

For now I just disable Sleep from Energy saver.

Hope Apple could fix this problem ASAP.