Skip to content

Instantly share code, notes, and snippets.

@cstrouse

cstrouse/lg-ultrafine-4k-and-5k-monitor-firmware.md

Last active April 10, 2026 22:28
Show Gist options

  • Select an option

    Learn more about clone URLs
  • Save cstrouse/73c9f1ff6b234457a856bd4bcb5b9617 to your computer and use it in GitHub Desktop.

Select an option

Learn more about clone URLs
Save cstrouse/73c9f1ff6b234457a856bd4bcb5b9617 to your computer and use it in GitHub Desktop.
Download ZIP
Firmware downloads and zip encryption passwords for LG Ultrafine 4k and 5k displays
@unixshaun
Copy link
Copy Markdown

unixshaun commented Jan 26, 2024

I have been searching for these updates for some time. Do you have a working link to: MODEL_27MD5KL_SV3.14_CV2.23_HV5250_NV4.15_AV0.3_TV43,6.59_20230519.zip ? Thanks!

@greteOne
Copy link
Copy Markdown

greteOne commented Feb 13, 2024

I have been searching for these updates for some time. Do you have a working link to: MODEL_27MD5KL_SV3.14_CV2.23_HV5250_NV4.15_AV0.3_TV43,6.59_20230519.zip ? Thanks!

try:
https://lmu.lge.com/ExternalService/lgscreenmanager/mac/FW/27MD5KL_TBT_PD/MODEL_27MD5KL_SV3.14_CV2.23_HV5250_NV4.15_AV0.3_TV43,6.59_20230519.zip

@ibotty
Copy link
Copy Markdown

ibotty commented Mar 4, 2024 •
edited
Loading

Thank you for finding these. Do you know how these can be applied to the displays? And does anyone know the right identifier for the LG 27MD5KLP-B.

@277072218
Copy link
Copy Markdown

277072218 commented Mar 21, 2024

https://lmu.lge.com/ExternalService/lgscreenmanager/mac/FW/24MD4KL_TBT_PD/MODEL_24MD4KL_SV3.00_HV5249_NV4.13_AV0.3_TV39,6.59_20190710.zip This is 24MD4KL

@277072218
Copy link
Copy Markdown

277072218 commented Mar 22, 2024

微信图片_202403212255501
24MD4KL update fail ，display like this

@vd12
Copy link
Copy Markdown

vd12 commented Sep 27, 2024

I have been searching for these updates for some time. Do you have a working link to: MODEL_27MD5KL_SV3.14_CV2.23_HV5250_NV4.15_AV0.3_TV43,6.59_20230519.zip ? Thanks!

try: https://lmu.lge.com/ExternalService/lgscreenmanager/mac/FW/27MD5KL_TBT_PD/MODEL_27MD5KL_SV3.14_CV2.23_HV5250_NV4.15_AV0.3_TV43,6.59_20230519.zip

Any chance to get MODEL_27MD5KL_SV3.04.... or MODEL_27MD5KL_SV3.10 firmware?

@cstrouse
Copy link
Copy Markdown
Author

cstrouse commented Oct 4, 2024

I've only found v3.04 and v3.10 for the 27MD5KA so far:

I'll see if I can brute force the path with ffuf or something for the 27MD5KL variant.

@vd12
Copy link
Copy Markdown

vd12 commented Oct 4, 2024

That would be great. I really appreciate your help.

@AdamVanL
Copy link
Copy Markdown

AdamVanL commented Oct 6, 2024

I have tried downloading these but it says they need a password. I have LG5k Ultrafine. Ever since ive updated to sonoma 14.7 it doesnt work. still works on all macbooks with Monterey

@cstrouse
Copy link
Copy Markdown
Author

cstrouse commented Oct 8, 2024 via email •
edited
Loading

@vd12
Copy link
Copy Markdown

vd12 commented Nov 2, 2024

Is there any way to upload firmware from one 27MD5KL and download it to another 27MD5KL?

@ramendog
Copy link
Copy Markdown

ramendog commented Nov 20, 2024

LG Screen manager immediately fails to update with these files. Is there some other way to apply the firmware updates individually after unzipping the contents?

@lalitkapoor
Copy link
Copy Markdown

lalitkapoor commented Mar 5, 2025

LG screen manager fails to install for one of my monitors. I noticed that it shows up as Hardware DDC controlled vs Apple Native like the other ones. Is there anyway to install the firmware without the LG Screen Manager app (tried setting open with rosetta as well)?

@jamesxsc
Copy link
Copy Markdown

jamesxsc commented Mar 2, 2026

Is it freezing at 20% and then crashing? If so I can help @ramendog @lalitkapoor

@erkankenc
Copy link
Copy Markdown

erkankenc commented Mar 5, 2026

I've recently bought a used LG 27MDKLA which I use with its original 2m active thunderbolt cable from a M4 Pro Macbook (Tahoe).

LG Screen Manager couldn't update the firmware (freezing at 20%), I've download the 3.10 version zip file from this topic, put it on the screen manager (without unzipping). Result is the same by freezing at 20%. I don't know if the 3.10 version is currently the latest or if I need to find the password of the file.

Could you help me the find the latest firmware and the solution to update? Thanks @jamesxsc @cstrouse

@jamesxsc
Copy link
Copy Markdown

jamesxsc commented Mar 5, 2026

I've recently bought a used LG 27MDKLA which I use with its original 2m active thunderbolt cable from a M4 Pro Macbook (Tahoe).

LG Screen Manager couldn't update the firmware (freezing at 20%), I've download the 3.10 version zip file from this topic, put it on the screen manager (without unzipping). Result is the same by freezing at 20%. I don't know if the 3.10 version is currently the latest or if I need to find the password of the file.

Could you help me the find the latest firmware and the solution to update? Thanks @jamesxsc @cstrouse

The issue is a bug double-freeing memory during programming of the scaler. I patched the app and ran successfully on my M3 Max running Tahoe: https://xscgroupltd368-my.sharepoint.com/:u:/g/personal/james_xsc_co_uk/IQDe5JyTr9N-QJFSNCQ2V3ucAcYAvsAWSKgPGnzgiVMuRi8?e=FTu38A

You may need to bypass security/ manually re-sign it to run it.

If that doesn't fix it, you'll want to look for crash reports e.g. ~/Library/Logs/DiagnosticReports/LG Screen Manager-2026-02-27-142637.ips

@erkankenc
Copy link
Copy Markdown

erkankenc commented Mar 5, 2026

I've recently bought a used LG 27MDKLA which I use with its original 2m active thunderbolt cable from a M4 Pro Macbook (Tahoe).
LG Screen Manager couldn't update the firmware (freezing at 20%), I've download the 3.10 version zip file from this topic, put it on the screen manager (without unzipping). Result is the same by freezing at 20%. I don't know if the 3.10 version is currently the latest or if I need to find the password of the file.
Could you help me the find the latest firmware and the solution to update? Thanks @jamesxsc @cstrouse

The issue is a bug double-freeing memory during programming of the scaler. I patched the app and ran successfully on my M3 Max running Tahoe: https://xscgroupltd368-my.sharepoint.com/:u:/g/personal/james_xsc_co_uk/IQDe5JyTr9N-QJFSNCQ2V3ucAcYAvsAWSKgPGnzgiVMuRi8?e=FTu38A

You may need to bypass security/ manually re-sign it to run it.

If that doesn't fix it, you'll want to look for crash reports e.g. ~/Library/Logs/DiagnosticReports/LG Screen Manager-2026-02-27-142637.ips

The app that you'd patched worked perfectly. At now, both version of apps show as "the software is currently up to date" (3.10,1.13,5237,3.05,0,1e for LG Ultrafine 27MD5KA). Thank you @jamesxsc

Currently on Tahoe 26.3:
All resolution, sleep/wake and USB functions work perfectly.
Only ALS Function isn't working as on the previous firmware. I don't know if this is a hardware or software issue, I suppose the disabled auto brightness function is common.

@colinsutton
Copy link
Copy Markdown

colinsutton commented Apr 9, 2026

Both the version of Screen Manager in the app store and the above patched version crash updating the firmware at 80% on Tahoe 26.4 with my 27MD5KL (3.04,2.23,5250,4.15,0.3,43,6.59)
https://www.dropbox.com/scl/fi/48xhzlgu8p9g5d4btd98w/LG-Screen-Manager_2026-04-09-153241_Booty.cpu_resource.diag?rlkey=05wol6uebduxuisvn2fnhbain&dl=0

@colinsutton
Copy link
Copy Markdown

colinsutton commented Apr 10, 2026

After updating to Tahoe 26.4.1 the monitor software version successfully updated to 3.14 using the above patched version.

@jamesxsc
Copy link
Copy Markdown

jamesxsc commented Apr 10, 2026

After updating to Tahoe 26.4.1 the monitor software version successfully updated to 3.14 using the above patched version.

glad - i don't have a -KL to test !

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment