I don't know what chughe17 is talking about. But my MacBook Pro 2011 supports sound and picture from my mini display port to hdmi.
Personally whilst running snow leopard about 6months ago, I did a system update. The thing just stopped working. Literally, as I rebooted after the update, it stopped working.
The problem seemed to be limited to mirroring the display only. If you add the display then it works ok. When mirroring it seemed to flick in and out, redetecting the display then eventually giving up.
Now updated to mountain lion and it works ok.
That's you're problem but if you go back through the thread you'll see that alot of people it's been the other way round, ie the Mountain Lion install killed it, or like me that its never worked at all using multiple cables, adaptors, televisions and verisons of OS X. Seems to me that it doesn't work and Apple aren't going to do anything about it. Dress it up anyway you want.
Hello again. I'm chiming in once more because the thread is still receiving posts 3 years and 41 pages after the original question and I'd like to update progress I've had since I last commented in September (14th, 2012) in case it helps anyone else.
No progress...but at least I haven't gone backwards .
I'm using a Kanex cable (mini display port to HDMI) and have managed to hook, and un-hook, my MBP (purchased early 2012) to a Sony HDTV numerous times without issue. I'm running Windows 7 and have ditched the Bootcamp graphics software (which I believe was the cause of at least some of my initial connection problems) in favour of Catalyst Control Centre and drivers that offers much more comprehensive options with regard to adjusting settings, tweaking appearance and mirroring etc. - options that were nowhere to be seen with the software and drivers provided by bootcamp (yes, the drivers and software were impossible to upgrade through the AMD website ).
The computer now stores my preferred settings and my screen mirrors perfectly almost as soon as it's connected to the TV and the sound is fine. The only issue I've struck is on closing the lid the TV display goes screwy.
This information is probably no good for the majority of you guys operating the Mac OS, but I at least feel confident in saying that the cable I'm using works as it should as does the hardware on the computer. Perhaps issues can therefore be put down to Mac software (as seems to be the general consensus)? To be honest, right now I just CBF logging out and back in and testing my cable etc in OSX, not unless Apple wants to cut me a 'Genius' paycheque.
This is still an unresolved issue. Except for egoistic replies of some apple fanboys. I have eary 2012 MBP MD103, on Mountain lion.
When i connect a external HD tv from thunderbolt port to mdp-hdmi adaptor and an hdmi cable. The MBP screen blinks to blue and returns. The hdtv does not detect any signal. The MBP does not detect any display connected to it. Tried all solutions in this thread but to not avail.
I am still having the same issue on my MacBook Pro (summer 2012 non-Retina Display). I started an Apple discussion a couple weeks ago. My issue is the mini-display to DVI cable. The cable is an Apple cable, not a third party cheap cable. Apple support did not help, hadn't heard of the issue.
External Monitor Goes Black using Mini-Display Port to DVI Cable
Hope everyone can see this. Well I have a Yamaha RX-v571 Reciever and a Imac from 2010. On my old reciever I didn't have hdmi hook up. All av hookups so I went directly to the tv with dvi to hdmi and had an rca with head phone jack to Imac to reciever for sound. With my new reciever it has a spot for hdmi and rca on the same channel of the reciever so you can stream and listen at the same time. The only in conviece is beside the hook is through the front of the reciever is that I have extra cables running from mac that I wish I didn't have there. But all in all I can blast music and watch net flix or even surf the web. When I'm tired I can play my ps3 or switch to cable tv to watch the evening news. so dvi to hdmi hook up to tv for picture sound is seperate rca with phone jack to reciever.
Hope this help future people out.
I ran into one of the problems described on this thread, banged my head against the wall and finally discovered a solution, so I figured I'd share.
Like many of you, my Thunderbolt audio output worked fine for a while then mysteriously stopped working one day. Upgrading to Mountain Lion wasn't the cause but also didn't help. Incidentally, the problem also manifested on my Bootcamp install.
No audio output via Thunderbolt / mini Display Port when connecting Macbook Pro to an HDMI-based AV system. No additional output target is available under System Preferences > Sound > Output.
Configure the AV system to disable HDMI control, HDMI pass-thru and HDMI audio return channel (ARC). Details below.
Macbook Pro (Mid-2012) with up-to-date Mountain Lion
moshi MiniDisplay Port to HDMI Adapter with Audio
AmazonBasics High Speed HDMI cable (3 feet)
Sony HT-SS380 AV system
Panasonic PT-AE900U projector
The projector does not support HDMI audio (it's a projector) and the AV system passed this fact through to the Macbook pro. Thus the Mac reflected the fact that no additional audio output target was available
On a hunch, I disconnected the projector from the AV system then reconnected the Macbook to the AV system. The additional audio output target was then available (SONY AVAMP) although the video obviously no longer worked.
On the HT-SS380 set "CTRL HDMI" to "OFF". This in turn turns off HDMI pass-through and HDMI audio return channel.
I suspect that this may represent a more general solution that can be applied in similar situations. If you're using an audio output device (projector, TV) that doesn't support HDMI audio, that fact may be forwarded to your Macbook, through your AV system. That in turn will disable the ability to output audio over Thunderbolt / mini Display Port.
I had a similar problem with my MacBook Pro 2009 model. After erasing all conent and reinstalling Mac OS X (10.8.2), the problem was not resolved, displaying content from my mini dvi to Sony Bravia TV. I went to a Mac Store, and the genius person was able to find a solution.
I was using a adaptor mini DVI to HDMI, which no longer works for MacBook Pro 2009 models. It did work here and there for a 2011 MacBook Air.
There is a company called IWIRES out of UK, that makes a single Cable, HDMI to MiniDVI. This product is sold through Apple in UK, but not here in the states. I was not willing to spend $45 for this, when I could buy iTV.
I was able to find a similar product on Amazon for a fraction of the cost: http://www.amazon.com/gp/product/B003OC6LWM/ref=oh_details_o00_s00_i00
This works great. No issues. I still continue to use my audio wire for the 2009 model, but not needed for 2011 Macbook Air.
Here's what you need to do.
1. Turn off both your T.V. and Mac.
2. Plug in all your connector cables: Mini Displayport to HDMI converter, and HDMI cable.
3. Turn on T.V. or Monitor.
4. Power up your Mac.
For some unknown reason the 2010 iMac can not transfer the video data when it is on, it must be restarted.
Hope this helped!
Ok since it is a long thread i thought i would summarize the results.
There definitely seems to be a hard/software problem associated with the thunderbolt/mdp port and its compatibility with HDMI especially in OS X Mountain Lion. The user has to go through an iteration of various solutions before he can come to a solution well suited to his issue.
Problem definition – You are trying to connect an external display like an HDTV to a macbook using the thunderbolt/mdp to HDMI cable/adaptor. The screen on the laptop blinks to blue and returns to original state and you HDtv returns “no signal/source” message.
- This pertains to the order in which you connect the cable. Ideally this should not matter, but some users seem to have success using this method. Shut down macbook, switch off the TV. Connect the cables. Now start the macbook and then the TV. If this does not work you can try the reverse that is switching on the TV first and then starting up the macbook. Some users seem to have limited success by putting the macbook to sleep and waking it up. Seems to be plug and play detection issue with Mountain lion
- Intel based macbooks have too GPUs. One a board based Intel GPU for light work and a third party GPU (like NVIDIA) for the most graphic intensive operations. The switching between this is automatic and should happen by itself when you connect an external monitor/tv. However it seems that this fails to happen in some cases. Gfx Card status is third party software than can be installed into macbook and lets you control the switching process. Some users seems to have success in connecting a external monitor when you set the macbook to use only the third party gpu but changing setting in gfx card status to discrete.
- This pertains to disc permissions, especially when you have recently updated the OS. You can go to the disc utility and scan for permissions. And if the scan throws up some graphics related problems , fixing them seems to solve some problems
- The cable/adaptor you are using. Macbook and Mountain lion seems to have a problem with adaptors.ie mdp to HDMI female cable. Some apple accessory manufacturers like Kanex and Iwires now supply direct cables ie mdp male to HDMI male. These cables seem to solve the problem in a vast majority of cases. The funny part is that HDMI warns that it does not support these cables and has issued notice to these cable manufacturers that they should make only adaptors.
Note: Post 2009 macbooks support sound through thunderbolt/mdp port. So if you using an older macbook you may not be able to get sound to work through HDMI.
Post 2009 macbooks which support sound may have problem with sound quality. There are far too many variables that maybe playing into this including cable quality. Also the HDMI is devoid of volume control and delivers only at 100% which maybe be jarring in audio equipments. A third party app called sunflower bed may resolve your problem. In sound setting of macbook you set device to sunflower and in sunflower you need to set device as HDMI. Now the macbook volume control will control HDMI volume too.