New Mac mini M4 Connection to Samsung 49" G9 Display

The Samsung monitor is saying it sense no connection. I am using a Micro HDMI which came with the monitor connecting the Mini with the monitor. Have tried unplugging all and waiting.


Is there a problem with using a Micro HDMI with the Samsung monitor (which does have a micro HDMI port)?

Mac mini (M4)

Posted on Mar 10, 2025 01:27 PM

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Posted on Mar 11, 2025 04:51 PM

I’m using Odyssey G9 OLED with a USBC to DisplayPort running at 5120x1440 240Hz. I was running into the same issue. What worked for me was:


  1. Make sure you update your G9 latest firmware (mine was last updated Oct 2024!)
  2. Turn off sleep mode on the Mac Mini


After that, switching off monitor, switching sources and back, Mac resumes right away. Hope this helped.

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Mar 11, 2025 04:51 PM in response to JCFrancesco

I’m using Odyssey G9 OLED with a USBC to DisplayPort running at 5120x1440 240Hz. I was running into the same issue. What worked for me was:


  1. Make sure you update your G9 latest firmware (mine was last updated Oct 2024!)
  2. Turn off sleep mode on the Mac Mini


After that, switching off monitor, switching sources and back, Mac resumes right away. Hope this helped.

Mar 10, 2025 02:26 PM in response to JCFrancesco

Odd, looking through the tech specs for the Monitor on Samsung's website, it does not appear to have a Micro HDMI port, only regular HDMI as does the Mac mini.

https://www.samsung.com/us/computing/monitors/gaming/49-odyssey-g9-dqhd-240hz-1ms-gtg-displayhdr-1000-gaming-monitor-ls49cg954enxza/


Are you certain its a micro HDMI and not say USB-C?


A regular HDMI cable should work from the Mac Mini's regular HDMI port to one of the monitor's HDMI ports.


What port are you using on the Mac Mini exactly?



Mar 10, 2025 08:46 PM in response to JCFrancesco

The new Mac's are very cable picky and do not do well using the cheap-o manufactures supplied video cables.


With you want is a short 3.3ft high speed 8k HDMI to HDMI cable.

for example: https://www.amazon.com/8K-HDMI-Cable-Highwings-Braided/dp/B08NX5CZTF/ref=mp_s_a_1_1_sspa?


Or a short 3.3ft high speed 8k USB-C to DisplayPort cable.

for example: https://www.amazon.com/dp/B08B3SB5VC/ref=sspa_mw_detail_5?

Mar 12, 2025 10:16 AM in response to JCFrancesco

If the Samsung supplied Micro HDMI to HDMI cable (micro HDMI in the display and standard HDMI in the Mac mini) is not working...?


Then you need to replace that Samsung cable with an aftermarket high speed HDMI or USB-C to DisplayPort cable.


for example: https://www.amazon.com/8K-HDMI-Cable-Highwings-Braided/dp/B08NX5CZTF/ref=mp_s_a_1_1_sspa?

for example: https://www.amazon.com/dp/B08B3SB5VC/ref=sspa_mw_detail_5?


For reference also see > Connect a display to Mac mini - Apple Support

Mar 11, 2025 06:49 AM in response to JCFrancesco

JCFrancesco wrote:
Hi Martin - Thanks for this response. The model number is: S49CG93*S

Well, that is a special model and it does indeed have a microHDMI connector. But that connector is the HDMI 2 input.


Have you set your monitor to use the HDMI 2 input? If your monitor is set for HDMI 1 (default) but you cabled into HDMI 2 you would indeed get a "no connection" message on screen ... due to no signal into HDMI 1.


Also check that the Input Port Version is set to HDMI 2.0 in your monitor's settings. Read the manual about where these settings are.



BTW, it would be much better to get a good, standard HDMI cable and use it with the monitor's HDMI 1 input. Most of the cables included with monitors, while they may "meet" the specs they are cheap cables. The "high speed" microHDMI cable that came with the monitor is only rated for 4K. Your monitor is an 8K gaming display. With this monitor you should use an 8K HDMI 2.0 certified cable like this one or better.

Mar 12, 2025 06:50 AM in response to JCFrancesco

JCFrancesco wrote:

I have a new cable arriving tomorrow. I am hoping that fixes the issue. I don't know how I could check or change anything on my monitor without any connection. Is that possible without any connection?

The monitor should have physical control panel on it to select the input. On the back.

The source button is the one you need to change the inputs.

Mar 10, 2025 07:43 PM in response to MartinR

Hi Martin - Thanks for this response. The model number is: S49CG93*S


The quick set-up guide that came in the packaging definitely shows a diagram of"Connecting using the Micro HDMI Cable". The back of the monitor that I have plugged into is also labeled Micro HDMI.


The reason I am using this HDMI connection rather then the regular is because this was the only cable supplied with the monitor that would fit. There was regular HDMI connector cable in the packaging.


I guess I could buy a regular HDMI cable and try that. But odd that it only came with a Micro HDMI cable.

Mar 12, 2025 07:13 AM in response to JCFrancesco

JCFrancesco wrote:
I have a new cable arriving tomorrow. I am hoping that fixes the issue. I don't know how I could check or change anything on my monitor without any connection. Is that possible without any connection?

Have you ever read the User Guide that came with your monitor? It's all there.


You can download another copy here -> https://www.samsung.com/ca/support/model/LS49CG932SNXZA/#downloads

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New Mac mini M4 Connection to Samsung 49" G9 Display

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