Mini display port to HDMI problem

It just does not work.

There is no options in "Display preferences" for external monitor till you connect it.

And connection is not working.

Before I bought the 3rd cable it worked.

I bought 3rd cable, most expensive in shop, and it worked well yesterday. Only sound did not work, but that was something already.

Today in the morning I tried to wake up a laptop and external monitor does not work anymore.

I tried to reboot laptop, monitor, used another cables for connection. Now nothing is working, not even cables which worked before.

To be sure it is not monitor - I connected Apple TV and it works just fine.

When I connect macbook through Apple TV it is laggy and does not cover 100% of the screen and not possible to work because of timeout.

So I cannot work now.

And I am very angry on Apple, because it seems they don't care about this issue.
This post have been created 6 years ago and still not solved! 😠

And btw:

- Macbook air 13", 2013 late

- Yosemite 10.10.5

- Dell S2415H

You know what man. I have this same issue with my late-2011 model. Only two things are finicky. One: the thunderboltport (hdmi-to-thunderbolt) isn't working. There's no signal from my computer of the tv's and monitors i plug into. To top if all off. This started when I upgraded to Yosemite. THAT was a good idea. "Sarcasm"

So I'm going to throw in too. I use a mini display to HDMI cable (NEET), no adapter, purely for running films and catch up tv from the mac to TV. Been using it for a couple of years now, no issues. This week I noticed it didn't pick up initially. Dismissed it.

Then tonight. Nothing.

When I plug the lead into my macbook pro (late 2009) it flickers but that's it.

Detect display detects nothing.

My TV recognises there's an HDMI lead plugged into it. I'm guessing the mbp does because it flickers when the lead is plugged in but that is it.

I've done a safe boot and a nvmar whatever thing. No change.

I'm going to see if I can get a lead tomorrow.

If that works I will post here.

Any suggestions would be appreciated.

UPDATE:

I ordered the exact same mini display port to HDMI lead (not adapter) from the same site as before. It's a NEET adapter. Cost me 13 quid in total. Plugged it in. Problem solved. My mac now recognises AND mirrors with the TV.

The difference is the plug fits into the MBP port much more snugly now.

The original cable is 3 years old.

Hurrah!

I am a new Macbook Air User.. Just bought a 4K 29.90 Mini DP to HDMI adapter and like many here.. simply can't get my TV to detect the signal..

found this very old discussion and tried most of the methods to change the settings...nothing work.

So today i went back to exchange..the salesman tested the adapter on a windows laptop and found it to be working perfectly...

But he was very helpful in the end as he ask me to try another 19.90 adapter which rated Full HD only that had usage example of Macbook or iMac on the packaging .. did an exchange and use the 10 difference to get a wire mouse.

Went home Plug in my macbook air and connect to my LED TV... if works perfectly immediately..

So my conclusion is not all Mini DP to HDMI adapter are compatible to Macbook.

My tips if you are getting Mini DP to HDMI adapter for the 1st time..

1) Get those that are Full HD only 1920 x 1080 and avoid those 4K HDMI.

2) Check on the packaging if it is specially designed for Macbook or iMac.

The brand of the 19.90 adapter i am using now is Mazer

My problem is the same HDMI-remote TV connection problem recited on this help page but somehow older or more basic. I'm running Snow Leopard 10.6.8 on a desktop iMac that is at least five years old. Unlike what you describe, my System Preferences menu doesn't display two windows or two little blue screens. It shows only the available resolutions with two buttons at the top, Display and Color, and two at the bottom Gather Windows and Detect Displays. Whatever I do, the TV monitor simply says No Signal. Now the really odd part, I had the HDMI-TV setup working back in June. Then left the country for a couple of weeks, shutting down everything and pulling the plugs. Now I can't get it to work again. Any idea why?

Wayne in Tokyo

So I completely thought this was bologna, but decided to try it anyway. It worked like a charm.

Cheers sir!

btw I had tried two different cords and two different monitors so I thought my port was ruined.

Unbelievable that until today, with this lots of people having this problem, Apple still doing NOTHING to help the customers.

I tried two adapters Mini display port to HDMI and no luck until now. I used the first one for several months and now it only work after i plug the HDMI cable in another notebook. I dont know why this happens, but after a short period of time it stops again. Im really sad with this condition and I need a response for that problem.

So I had this problem for all of ten minutes before unplugging my 3.5mm cable input I had running separate stereo speakers and the display came up immediately after re-opening system preferences. See if that works and if it does you can thank marijuana! Cheers.

same problem, my macbook pro early 2011, now with a SSD. i guess the thunderbolt port is making short circuit, and burning the cable, minidsplay port to hdmi and to dvi, the only moment that didnt do that is when i unppluged the cable before turn it on or off, i ´ve broken like 3 diferent cables, even a HDMI 4K one. there is not solution for this from apple, i´m way out warranty, they care even less.

Das kann Dir mit jedem Gerät passieren, so viel Freude wie mit Mac werdest Du nicht mit anderen Gerät haben. Verstehe nicht das sich Apple nicht darum kümmert, insistieren vielleicht nur schlechter Kontakt.

I've had the same problem twice. first time was when i updates to sierra. i thought i busted my old moshi so i bought a new one an innerexile 4k adaptor. didn't work either. so i borrowed my friends mbp (we both have the first aluminium MBPs) and we both upgraded our OS to sierra and all the adaptors we had didn't work. we were both puzzled. so we waited for a security update and all the adaptors worked fine for a while. and then recently this vintage of a laptop updated. now none of the adaptors work again. kinda frustrating. can't watch my netflix on my tv. i hate watching on a small screen.

Thank you! I have been struggling with this for months. I hooked it up in the order you described and it worked. I remember in the old days paying great attention to this type of thing. Then hookups got more foolproof. But this will allow me to continue to use my old mac for AV applications going forward. Thanks!

http://www.apple.com/feedback/macosx.html

i'd go for whatever you find in the official apple store to have the highest possiblity for it to work.

http://store.apple.com/us/search?find=hdmi