Mac mini 2014 won't wake monitor via HDMI

Hi,

actually, with today update (10.11.3), I'm still facing the same issue. 😟

Problem solved! (For about 24 hours now, at least.) Got a DVI cable and used the HDMI to DVI adapter. At first I had the opposite problem: About a minute after the Mac mini went to sleep, it would wake up again. Eventually the screensaver would come on until it went to sleep again, then a minute later it came back on. I clicked on "Prevent computer from sleeping automatically when the display is off" in the Energy Saver Preference and now it's functioning the way all my Macs always used to.

I am finding that every time Apple does an update, they break this.

Mavericks broke this and eventually a follow on patch fixed it.

Then Yosemite broke it and a follow on patch fixed it.

Now El Capitan breaks it again.

When I come out of sleep mode, one monitor gets the "pinkeye" treatment:

Yes, my tv is a Samsung 32" and I don´t conect in on. I belive that is my Mac (2014), because I off the Mac Mini and I on, too. This is a error in Mac Mini. Ok.

For all of you who are struggling with this.... it *****! I wish Apple would have a fix or something...but it seems it is probably hardware related (endemic to the way the hardware is designed) rather than something that can be fixed by a software upgrade.

I have found a way to solve this problem...

My setup is a 2014 Mac Mini, a Vizio 55 inch 4K monitor (no tuner). I find that the only way that the monitor can wake up is when I reboot. If the computer goes to sleep...it does not wake up. I found a person's post here...with power management settings and that helped some... but that is not the nature of my "fix".

I don't want the computer to time out and sleep...or screen save...or whatever. I turned off the sleep settings on the Mac Mini.

The Solution:

I needed a way to constantly (a relative term) stimulate the display. My roommate does a lot of telework... via VPN, remote sessions, etc...and many of those systems will time out if there is no mouse movement or keyboard activity. If you get up to use the restroom, when you come back, your session is disconnected. They make something called the "Jiggler". It is a USB dongle... who's only function is to... every so often.... (10 seconds?) move the mouse by a pixel or two. This does not require you to move the mouse constantly by hand... and because it only 'jiggles' it by a pixel or two... it does not cause problems. The 'jiggling' is totally transparent.

I purchased one of these dongles...and because I have a external powered 28 port USB hub associated with my Mac Mini (Don't hate... it is truly awesome!), I had plenty of room.

My only draw back is that I have to turn the monitor off when I walk away (via the remote control) ... and don't plan on being there for a while as the way I am solving the problem obviates the whole display sleeping functionality and I don't want burn in on my awesome monitor! This is something I can do and most certainly live with. The Jiggler jiggles... and the display never sleeps and I am happy. Problem solved.

The Jiggler is the "WiebeTech Mouse Jiggler MJ-1 by CRU Inc. and (SC)Amazon.com has it for $17,99. A small price to pay

So, in a nutshell... things are good... and I am enjoying my 55" LED 4K monitor!

Good luck ;-)

I have exact same problem with mini 2012 and 2014....different monitors made no difference. this is absolutely without a doubt a failing on the part of Apple and they have done nothing to fix....i am chucking my mini, may just chuck Apple

This solution fixed my problem - at least in the short term!

Since upgrading to Sierra I was totally unable to get any HDMI monitor to work despite trying everything all day. I used "Share Desktop" to control the computer and made these changes to the energy saver settings and then restarted the computer and it immediately worked!

I don't know if this is a permanent fix, but I wanted to go ahead and reply positively in case I forget to come back. 🙂

Since the latest update to Sierra (10.12.1) yesterday, I'm finding my monitor is waking up faster than it ever has since connected by HDMI. It's a definite improvement. My monitor is an Acer S277HK with 4k resolution. After I've tapped my keyboard to wake the monitor and its power switch goes from amber to blue, I am only counting to 2 seconds for the screen to display instead of the 6 or 7 it was taking previously.

Add Sierra to the list of oSX iterations that break it.

- frequently fails to wake up...despite supposedly options never allowing to go to sleep!

- takes 30 seconds to a minute to wake up, even with input made from keyboard / mouse

- "pink eye" treatment

tried numerous different cables / displays. Nothing seems to be a permanent resolution. If only it were consistent.

Routing the HDMI output from MM to AV receiver is a no-go, as every time switch inputs on the AV and then go back to MM, the display disappears.

Apple kit just used to work. Oh for the good old days.

I have actually found Sierra to be the first OS to not have this issue on my mini. It usually always is a problem in the first release and then after one of the patches it is fixed (until it is broken again). But Sierra is strong on my mini from the start.

My experience was similar to another post back in 2015 who commented an update to OS X solved the problem. But fast forward to Sierra and the problem returned for me.

So somewhere along the way Apple figured out the problem and now they need to do it again.

maybe the solution is to quit updating once they fix problems that are so disruptive on a daily basis.

Having been in tech for ~25 years and having worked on many platform projects, this inevitably points to a failure in their test matrix. When bugs come up, they are noted and cataloged for testing in the future. So if you have problem X arise in the 1.0 product, when you introduce 2.0, you are testing for X along with all of your standard issues. This is why each successive release takes more time, the test matrix keeps getting larger.

But for some reason Apple is not doing a good job of managing the test matrix because this should have been logged and tested as it has happened for me all the way back to 2014 and probably earlier.

I had this problem in El Capitan and it was never resolved. Since upgrading to Sierra I now have the exact opposite problem. A minute or so after the display and computer go to sleep, they suddenly wake back up. This goes on forever unless I actually put the computer to sleep manually and turn the display off by hand.

Hi, for the blur image, please try this: http://www.mathewinkson.com/2013/03/force-rgb-mode-in-mac-os-x-to-fix-the-pictur e-quality-of-an-external-monitor.

Did you delete the physical folder too or just the files within the folder?