External Monitor Magenta

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Level 1

4 points

External Monitor Magenta

In my role as Technical officer at the State Library Qld, I've had several experiences using a variety of MBP's connecting to external displays which show a 'Magenta' image. This is only a problem with Apple devices as PC in the same environment do not have this issue. I have researched on the web and read various different reasons given and some potential solutions. However the underlying cause is the MB something has changes in recent OSX updates that have disrupted the video output. This change is making a mockery of your technology and damaging the user experience. Also the inability to connect to multiple displays with out installing display link drivers and purchasing new 'dongles' for M1 & M2 chipset machines is leading customers away from apple.

Posted on Nov 24, 2022 04:37 PM

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Answer 1

JayDeeKay76 Author

Level 1

4 points

Nov 27, 2022 06:12 PM in response to Grant Bennet-Alder

Hi Grant,

I am a long time apple user. I do not think apple products are awful.

I will endevour to get some device specifics, how ever as mentioned in my initial inquiry it is the most recent machines and OSX that have exhibited this issue. It occurs with genuine apple accessory dongles.

I did not realise that it was only volunteers who replied here.

Here are some links to forum questions like mine.

External Monitor magenta - Apple Community or this one https://www.reddit.co

I will take some photos to show what is occurring.

As mentioned originally, It has been a number of Client machines which I provide technical support with.

As mentioned in the same system Win based PC's function as expected.

I have been working with large scale audio visual systems for the last 30 years so please avoid the condescending attitude.

regards,

JK

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Answer 2

Nov 24, 2022 07:13 PM in response to JayDeeKay76

VGA interface can show a strong magenta cast when its plug is loose.

All later interfaces send packetized data to the display, so there is no opportunity for cable problems to cause color casts of that type.

There are well over 100 computers that bear the name "MacBook Pro", issued from 2006 to current model year. ¿which is yours?

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Answer 3

JayDeeKay76 Author

Level 1

4 points

Nov 26, 2022 07:58 PM in response to Grant Bennet-Alder

Hi Grant, I’ve been working as a professional in the Audio Visual industry for nearly 30 years. No equipment I currently use has VGA interfaces. The questions I asked are to do with a variety of current MBP laptops. When a display system whether it is a projector, switcher or just multiple external monitors only receives a magenta hued image & a Windows machine displays correctly on the same setup, it can only be the display adapter in the Apple machine or the drivers the OSX uses to generate video. Please have someone with an understanding of this address this problem with your hardware/ software. Thank you.

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Answer 4

Nov 27, 2022 05:56 AM in response to JayDeeKay76

<< Please have someone with an understanding of this address this problem with your hardware/ software. Thank you. >>

Readers here are other Users like you. Items posted here are not tracked, and the only Apple employees who could respond are primarily responsible to see that posts don't go completely un-answered.

If you would like Apple to resolve what you are saying is a technical issue, you will need to make your case with Apple Support, using one (or more) specific Mac (serial number required) and a list of connected equipment and a way to reproduce the problem in an Apple Lab.

If no resolution can be easily found, you need to press the Apple Support agent to file a Bug report or forward you to a specialist for further investigation. If you give up along the way, nothing will be tracked and nothing will change.

Support

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Answer 5

Nov 27, 2022 06:04 AM in response to Grant Bennet-Alder

as someone who volunteers to work with Users daily to solve display and other issues, I find your description of the issue remarkable.

It is completely devoid of ANY specific details, e.g,; what Macs, what cables, what adapters, what docking stations, what version of MacOS, what user software, and more.

If you would like Readers here to work with you provide some possible solutions or work-arounds, that is the sort off specific stuff that would be required. As written, the only data trend I can extract from what you have posted to date is that you seem to think all Macs are awful.

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Answer 6

Nov 27, 2022 09:11 AM in response to JayDeeKay76

One other note.

I read hundreds of postings about MacBook Pro on these forums, and have done so for many years.

Yours is the first and ONLY report of these sorts of magenta-hue problems on more that one computer.

I find it extremely unlikely that you have a pervasive hardware issue that no one else has EVER encountered -- Apple shipped 20 million Macs last year, and yours appear to be the ONLY ones with this issue.

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Answer 7

Nov 27, 2022 06:57 PM in response to JayDeeKay76

HDMI cables you want for HDMI-only Displays (higher resolutions than 720p TV sets) are marked as Certified with an anti-counterfeiting tag and are labeled:

"Premium High Speed HDMI cable" or that + "with Ethernet" --OR--

"Ultra High Speed HDMI cable" or that + "48G"

Cables with No Certification tags are good for your standard 720p TV set, and not much more.

HDMI computer output is bandwidth limited. HDMI output is suitable only for DIRECT connection to a display's HDMI input, PROVIDED you use a Premium High Speed cable with a certification tag.

Better results are always obtained when you use DisplayPort family or its support built into ThunderBolt or USB-C.

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External Monitor Magenta

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