iM 4,1-14,4 2011 iMac Graphics Card Upgrade

[Ausdauersportler]

The only thing I'm in doubt now is wether I'll need to use a 1mm copper plate or not. I've read somewhere that someone strongly recommended the use of this plate on a k610 or AMD WX... GPU in order to keep low temps. I don't know if this is the case with the k1100m. Would anyone with experience advise me about this?

This really depends on your particular heat sink. The plate can be thinner, quarter or half mm just enough to avoid contact of coils and sink and guarantee proper contact of gpu and sink at the same time. So be prepared to use one.
The 21.5 sink has already plastic strips to avoid shorts.
These sinks weren’t simply designed for different cards.
Pretty sure this has been written before….

 

[bob-iMac2010]

This really depends on your particular heat sink. The plate can be thinner, quarter or half mm just enough to avoid contact of coils and sink and guarantee proper contact of gpu and sink at the same time. So be prepared to use one.
The 21.5 sink has already plastic strips to avoid shorts.
These sinks weren’t simply designed for different cards.
Pretty sure this has been written before….

Thank you for your advice. I think I should buy the 2 thicknesses just in case. Can you recommend me a provider where you bought from? Also, what size should this plate be? I've seen ads in my country offering 15x15mm plates 1mm thick but I'm not sure these are the same you mention (they look beveled).

 

[Nguyen Duc Hieu]

Thank you for your advice. I think I should buy the 2 thicknesses just in case. Can you recommend me a provider where you bought from? Also, what size should this plate be? I've seen ads in my country offering 15x15mm plates 1mm thick but I'm not sure these are the same you mention (they look beveled).

For the copper shims, I bought all thickness available (0.5, 1.0, 1.5) to try. They are cheap enough to worry about which size to buy. I also bought thermal pads of different thickness to fit with the copper shims.
The principle is always use the thinnest one if possible.
About the size, to me 20x20mm is enough to cover the GPU chip. 30x30mm will do, too. As long as it doesn't touch other components on the MSM card.
The HD4670m heatsink will fit perfectly to the K1100m, no grinding is required.

 

[Gorditcho]

** NVIDIA Quadro K3100M Mac Edition ROM **
Genuine Native Boot Screen & Brightness Control​

View attachment 942193


Pre-installation Requirements:
- iMac12,2 (27-inch Mid 2011) Mac-942B59F58194171B (Tested machine)
- BootROM: 87.0.0.0.0. Please use High Sierra to update your BootROM to latest version.

- GPU Variant: N15E-Q1-A2

- Hynix GDDR5 Die Generation variants
View attachment 1687878
H5GQ2H24AFR - Hynix 1st Generation die - VDD 1.5V, use K3100M_AFR.rom
H5GC2H24BFR - Hynix 2nd Generation die - VDD 1.35V, use K3100M_BFR.rom
H5GQ2H24BFR - Hynix 2nd Generation die - VDD 1.5V, use K3100M_BFR.rom

known working cards:
Dell K3100M vbios: 80.04.B0.00.0A
HP K3100M vbios: 80.04.CD.00.0A. PN: 744354-001

This ROM does not require a 3rd party bootloader like OpenCore.
This ROM is build on the same principles as my K4100M. Unfortunately, the color-pixel bug is still present. But I am working on it. The brightness will need to be adjusted via a kext as previous. I have a feeling that the native brightness dimness is also inline with the same generic driver bug previously mentioned. The rom has a modest clock table boost as well.

Post-installation Requirements:
Brightness Control Stepping Mod:
-Turn computer on, hold down Command(⌘)-R
-Choose Utilities > Terminal
-Enter:csrutil disable
-MacOS Catalina: requires you to make root writeable: sudo mount -uw /
-You can download 'Hackintool v3.05' , navigate to View attachment 1804670 menu, use the View attachment 1804687 icon at the bottom to disable gatekeeper and mount the disk in read/write mode.
-Download and open 'Kext Utility v2.6.6'

-Navigate to S/L/E (System/Library/Extensions)
-Copy "AppleBacklight.kext" to Desktop
-Edit: AppleBacklight.kext/Contents/Info.plist
-Scroll down to: IOKitPersonalities > AppleIntelPanelA > ApplePanels
-There you find several Apple LCD profiles.
-For the iMac 2011 27" machine locate:

<key>F10Ta007</key>
<data>
ABEABgALABQAHAAnADMAPwBOAFwAZwBzAIEAkQClAL8A2wD/
</data>

-Change the <data> section to:
ABEAAgA3AF8AigCzAOsBJAFnAakB1AIJAlQCogL4A00DlgRpBGk=

-Drag your modded kext into Kext Utility, allow it correct permissions
-"Applebacklight.kext.bak" folder will be created
-Reboot

The above data pattern will allow for a wider span of steppings for the brightness control and utilizes more of the capacity of the HD3000. If you have a different machine, your panel ID can be found by going to System Preferences > Displays > Color > Open Profile > mmod

Caveats post-install/Bugs:
-16bit resolution glitch of UGA_DRAW_PROTOCOL - temporary solution: activate a sleep cycle and return, this should now clear the issue.

warning: please remember this is a WSON based card. You will be unable to recover from a bad flash with clip.



View attachment 939736 View attachment 939740

"insanely great!"
-Steve Jobs

**update**
01-27-2021 BFR-mem:1800Mhz; TDP:849.5Mhz, Rom Ver:31.6B.32.37.B1
12-07-2020 TDP/3D/Boost adjusted for both ROMs
12-06-2020 new roms for Hynix AFR and Hynix BFR based vRAMs should fix white/black screen issue
10-04-2020 working on Catalina 10.15.7, HP PN:744354-001 @GButorin
08-04-2020 working on Sierra 10.12.6 @Ausdauersportler

Hey, thanks for this info, it's invaluable. I'm trying to do the backlight mod, however I'm fairly new to this kind of software modding and I'm having a lot of trouble. I do all the steps outlined above, but I'm always getting the message that I don't have the right permissions to change the kext, but it says I can make a copy. What am I doing wrong? By the way I'm doing this on a 2011, 27" iMac

 

[exFictitiouZ]

Hey, thanks for this info, it's invaluable. I'm trying to do the backlight mod, however I'm fairly new to this kind of software modding and I'm having a lot of trouble. I do all the steps outlined above, but I'm always getting the message that I don't have the right permissions to change the kext, but it says I can make a copy. What am I doing wrong? By the way I'm doing this on a 2011, 27" iMac

Modding AppleBacklight.kext is deprecated as of now. Use OCLP to inject kexts instead. With OCLP, you don't need to modify kexts.

 

[junley4]

Hey, thanks for this info, it's invaluable. I'm trying to do the backlight mod, however I'm fairly new to this kind of software modding and I'm having a lot of trouble. I do all the steps outlined above, but I'm always getting the message that I don't have the right permissions to change the kext, but it says I can make a copy. What am I doing wrong? By the way I'm doing this on a 2011, 27" iMac

We have the same machine and gpu. If you are running (or planning to run) big sur, then install oclp and it will do everything for you.

 

[junley4]

I have a similar issue with a 12,2 with a K3100M. If I shut down I get an "unresponsive power button" or if the machine goes to sleep it won't come back, I have to reboot (and have an unresponsive power button)

A couple of other thigns I've found:

• If I push the power button a bunch of times, waiting about 2 seconds in between pushes the system will eventually come back. Sometimes it takes 20-30 pushes to get it
• If I do a "restart" from the Mac menu the system will always reboot
• If I shut it down and then wait about 10 minutes before restarting fewer power button pushes will be required

At some point I'm going to take it apart and try the card in another Mac. the 6970 card that was in this one is kaput so I can't go back to that one but never had the issue prior to changing the card. But until then I just prevent the system from going to sleep and hope that the power doesn't go off in the house

It happened to me on my 12,2 imac with k3100m... the problem was power supply. i changed the power supply and all is well.

The best way i found to be able to start the imac is to turn the UPS off then on again, after 5 seconds push the power button of imac. It always starts my machine 100%. But that is a hassle for me so i just bought another power supply to relieve myself.

 

[Ausdauersportler]

AMD W6170M 2GB support (AMD Radeon R9 M280X 2GB)

This card has been produced in many variants and comes in different PCB colors, currently I have only tested the blue HP AMD version listed below:

Type	ident	device-id	working
Blue HP PCB	109-C600A1-01_02	6646	yes

It is a big MXM-B card only fitting into 27 inch iMac models. The card will use GOP vBIOS and needs OpenCore to provide a boot screen emulation.

After installing the card it will boot directly into any macOS later than Sierra. It will be recognised as AMD Radeon HD8xxx card. Using OpenCore with the settings described below will change the name to AMD Radeon R9 M280X (which is purely cosmetic) and enable the one external display port to use a single external monitor. So the current stock OCLP will support this new dGPU even without manual changes.

In case you have a working system before changing the card just run OLCP, select the proper MXM GPU type to AMD (GCN) and build and install OpenCore to your system and reboot. Otherwise use another Mac to create the OC settings or create a OpenCore BootCD.

The settings needed are equivalent with adding radpg=15 -wegtree apdpmod=pikera to the boot-args in the config.plist of OpenCore.

Known issues:
- external display sync is broken on any iMac and needs the main LCD to go to display sleep once, works fine after connect and sleep
- iMac12,2: sleep/wake broken - black screen on cold boot needs PRAM reset each time

Known features:
- sleep/wake is working on iMac11,1 and iMac11,3 using OCLP 0.3.3
- Airplay is working until Catalina as with any other AMD metal card on iMac11,x and iMac12,2 (without using QuickSync)
- high metal scores
- boot screen with OpenCore
- brightness control working
- GPU power management working
- needs Sierra or better (AMD support)
- still full Monterey B10 support (no root patching needed unlike Kepler)
- using AMD8000 driver
- BlackMagic RAW Speed Test shows 4K Metal encoding capabilities close to the WX41X0 GPU type
- DRM with OCLP 0.6.2+

Performance:
- GeekBench Metal: > 21.000
- GeekBench OpenCL: > 19.000
- Valley: 38,6 FPS, 1614 Score
- MetalBench: 57 MRays/s
- CoreClock: 300 MHz idle - 1100 MHz max
- MemoryClock: 150 MHz idle - 1500 MHz max
- PowerDraw: 8W idle - 75W max

Notes:
- this card needs a big MXM-B heat sink of the Mid 2011 models and some grinding (7mm x 7mm) in upper right corner (same grinding needed for S7100X, W7170M, and M6100, too)
- the smaller Apple X-clamp can be used, the bigger one needs heavy adjustments and it is not worth the trouble
- this card may also need a thin copper plate (thickness 0.3 to 0.5 mm) of size 20mm x 20mm placed between GPU and heat sink to avoid shorts and guarantee optimal heat transfer. I tested it both way with copper plate and without using M3 strips to avoid shorts. Heat coupling is different, but both methods work. K5 Pro for memory.
- replace the ODD temp sensor to heat sink
- use Macs Fan Control (safety belt)


Experiences on iMac12,2 (Mid 2011), added 10/20/2021
- sleep/wake still broken
- the metal and OpenGL performance is on level of the WX4150
- Monterey is working perfectly, Ventura with OCLP patching
- screen recording is working
- VideoProc shows no acceleration, although VDADecoderChecker reports hardware acceleration

Download:
- please check out this site

 

[amd is the best]

Is the K3100M going to offer a jump in performance over my original 6970M 1GB?

I'm trying to weigh the pro's and con's with my situation. My 2011 iMac 27 i7 is becoming less and less supported by the day (from a software standpoint) and I am highly considering a GPU update and doing the DosDude1 patch for running a newer OS. The machine is solid and has suited me very well for a decade. I hate to ditch it since it does all I need my mac to do (edit video and 3d modeling/printing).

Pros:
New OS
Keeping a very solid machine running
Performance bump?

Cons:
I have to ditch my cinema display (no 2nd monitor support from what I gather)

 

[Ausdauersportler]

Is the K3100M going to offer a jump in performance over my original 6970M 1GB?

I'm trying to weigh the pro's and con's with my situation. My 2011 iMac 27 i7 is becoming less and less supported by the day (from a software standpoint) and I am highly considering a GPU update and doing the DosDude1 patch for running a newer OS. The machine is solid and has suited me very well for a decade. I hate to ditch it since it does all I need my mac to do (edit video and 3d modeling/printing).

Pros:
New OS
Keeping a very solid machine running
Performance bump?

Cons:
I have to ditch my cinema display (no 2nd monitor support from what I gather)

There is a performance section on post #1, please check it out. There is support for at least one external display with every replacement card and every iMac supported/listed. Only the 2nd external display port within the iMac12,x becomes non functional to connect a display directly, but you can use it with any other Thunderbolt device including a dock.

 

[m0bil]

Is the K3100M going to offer a jump in performance over my original 6970M 1GB?

I'm trying to weigh the pro's and con's with my situation. My 2011 iMac 27 i7 is becoming less and less supported by the day (from a software standpoint) and I am highly considering a GPU update and doing the DosDude1 patch for running a newer OS. The machine is solid and has suited me very well for a decade. I hate to ditch it since it does all I need my mac to do (edit video and 3d modeling/printing).

Pros:
New OS
Keeping a very solid machine running
Performance bump?

Cons:
I have to ditch my cinema display (no 2nd monitor support from what I gather)

If you edit video, you better get an AMD card for HEVC and H.264 hardware acceleration.

 

[Radical78]

I have a similar issue with a 12,2 with a K3100M. If I shut down I get an "unresponsive power button" or if the machine goes to sleep it won't come back, I have to reboot (and have an unresponsive power button)

A couple of other thigns I've found:

• If I push the power button a bunch of times, waiting about 2 seconds in between pushes the system will eventually come back. Sometimes it takes 20-30 pushes to get it
• If I do a "restart" from the Mac menu the system will always reboot
• If I shut it down and then wait about 10 minutes before restarting fewer power button pushes will be required

At some point I'm going to take it apart and try the card in another Mac. the 6970 card that was in this one is kaput so I can't go back to that one but never had the issue prior to changing the card. But until then I just prevent the system from going to sleep and hope that the power doesn't go off in the house

I have the same issue with my 11,1 with a K3100M...

If it goes to sleep I have to restart pushing the power button.

If I leave the iTunes playing music the screen goes black, there's no problem. Leave the iTunes muted if you want to "wake up" the iMac.

The issue is Only when it really goes to sleep mode.

ps. Thanks for the input. Hope someone tell us why it won't wake up...

 

[idenis42]

Experimental AMD W6170M 2GB support (AMD Radeon R9 M280X 2GB)

This card has been produced in many variants and comes in different PCB colors, currently I have only tested the blue HP AMD version listed below:

Type	ident	device-id	working
Blue HP PCB	109-C600A1-01_02	6646	yes

It is a big MXM-B card only fitting into 27 inch iMac models. The card will use GOP vBIOS and needs OpenCore to provide a boot screen emulation.

After installing the card it will boot directly into any macOS later than Sierra. It will be recognised as AMD Radeon HD8xxx card. Using OpenCore with the settings described below will change the name to AMD Radeon R9 M280X (which is purely cosmetic) and enable the one external display port to use a single external monitor. So the current stock OCLP will support this new dGPU even without manual changes.

Run OLCP and let it automatically create an AMD (metal) config and add the lines starting with the <key>rebuild-device-tree</key> into the DeviceProperties section (this is an iMac12,2 example):

                        <key>PciRoot(0x0)/Pci(0x1,0x0)/Pci(0x0,0x0)</key>
                        <dict>
                                <key>shikigva</key>
                                <integer>80</integer>
                                <key>unfairgva</key>
                                <integer>1</integer>
                                <key>rebuild-device-tree</key>
                                <integer>1</integer>
                                <key>agdpmod</key>
                                <string>pikera</string>
                        </dict>

These settings are equivalent with adding -wegtree apdpmod=pikera to the boot-args in the config.plist.

Known issues:
- sleep is broken on iMac 2011 (disable system sleep in system prefs energy settings)
- external display sync is broken on any iMac and needs the main LCD to go to display sleep once

Known features:
- sleep/wake is working on iMac11,1 and iMac11,3
- Airplay is working until Catalina as with any other AMD metal card on iMac11,x and iMac12,2 (without using QuickSync)
- high metal scores
- boot screen with OpenCore
- brightness control working
- GPU power management working
- needs Sierra or better (AMD support)
- still full Monterey B10 support (no root patching needed unlike Kepler)
- using AMD8000 driver
- BlackMagic RAW Speed Test shows 4K Metal encoding capabilities close to the WX41X0 GPU type

Performance:
- GeekBench Metal: > 21.000
- GeekBench OpenCL: > 19.000
- Valley: 38,6 FPS, 1614 Score
- MetalBench: 57 MRays/s
- CoreClock: 300 MHz idle - 1100 MHz max
- MemoryClock: 150 MHz idle - 1500 MHz max
- PowerDraw: 8W idle - 75W max

Notes:
- this card needs a big MXM-B heat sink of the Mid 2011 models and some grinding (7mm x 7mm) in upper right corner
- the smaller Apple X-clamp can be used, the bigger one needs heavy adjustments and it is not worth the trouble
- card card may also need a thin copper plate (thickness less than quarter mm) of size 20mm x 20mm placed between GPU and heat sink to avoid shorts and guarantee optimal heat transfer. I tested it both way with copper plate and without using M3 strips to avoid shorts. Heat coupling is different, but both methods work. K5 Pro for memory.
- replace the ODD temp sensor
- use Macs Fan Control anyway (safety belt)

If anyone is interested in getting a such a new card already flashed let me know via PM.

The test in the Monterey system is also false. It is better to test on Mac OS X 10.13.6

 

[Ausdauersportler]

The test in the Monterey system is also false. It is better to test on Mac OS X 10.13.6

Why? Do you have any evidence to back this claim up?

 

[idenis42]

Why? Do you have any evidence to back this claim up?

Without bootloader: MacOSX 10.13.6: Valley - Score 2976, FPS 72.
MacOSX 11.6: Valley - 2701, FPS 64. MetalBench - 179-240 MRays

With the OPENСORE loader: Mac OS X 10.13.6: Valley - 2974, FPS 71.1
Mac OS X 11.6 - Valley - 1696, FPS 40.5. Metal Bench - 110-167 MRays

On the macOS X 12 system, it is also slow through the bootloader.

This is how it works for me. Even AMD 6970 native also lies like that in BIG SUR... For example, in the system 10.13.6 shows 15 FPS. In the 11.6 system, it shows 4 FPS.

OpenCore breaks the video card! What exactly is interfering inside OpenCore?

 

[Ausdauersportler]

Without bootloader: MacOSX 10.13.6: Valley - Score 2976, FPS 72.
MacOSX 11.6: Valley - 2701, FPS 64. MetalBench - 179-240 MRays

With the OPENСORE loader: Mac OS X 10.13.6: Valley - 2974, FPS 71.1
Mac OS X 11.6 - Valley - 1696, FPS 40.5. Metal Bench - 110-167 MRays

On the macOS X 12 system, it is also slow through the bootloader.

This is how it works for me. Even AMD 6970 native also lies like that in BIG SUR... For example, in the system 10.13.6 shows 15 FPS. In the 11.6 system, it shows 4 FPS.

OpenCore breaks the video card! What exactly is interfering inside OpenCore?

If you have flashed an older vBIOS than you may experience the sleep performance bugs. Before and after sleep these older vBIOS versions performed differently. This has nothing to do with OpenCore. Without OpenCore you cannot even install and run Big Sur unless you use the -no_compat-check trick.

1. both your posted 10.13.6 Valley Scores above are the same with and without OpenCore (so where is the famous OpenCore breaks the video card, here?)

2. The 6970 has no support with Big Sur and you need to patch OpenGL functionality back to get at least some reasonable data. Did you apply the root volume patches with your 6970?
The 6970 runs at approx. 30 FPS with Valley/OpenGL with High Sierra. There have been at least 10 uploads with this values. It should report nearly the same with patches running Big Sur.

3. The single 1696 Score / 40.5 FPS is definitely a Benchmark with wrong settings - post a screen shut showing the eact settings - or it is the sleep bug.

4. There have been no WX7100 or RX480 MetalBench result posted with more than 165-175 MRays/s - you should make a screen shot of your 240 MRays result and post it.

Your former posts were unfortunately full of little errors. You must understand I cannot trust your claims here unless you can prove them! This is all about facts.

 

[idenis42]

If you have flashed an older vBIOS than you may experience the sleep performance bugs. Before and after sleep these older vBIOS versions performed differently. This has nothing to do with OpenCore. Without OpenCore you cannot even install and run Big Sur unless you use the -no_compat-check trick.

1. both your posted 10.13.6 Valley Scores above are the same with and without OpenCore (so where is the famous OpenCore breaks the video card, here?)

2. The 6970 has no support with Big Sur and you need to patch OpenGL functionality back to get at least some reasonable data. Did you apply the root volume patches with your 6970?
The 6970 runs at approx. 30 FPS with Valley/OpenGL with High Sierra. There have been at least 10 uploads with this values. It should report nearly the same with patches running Big Sur.

3. The single 1696 Score / 40.5 FPS is definitely a Benchmark with wrong settings - post a screen shut showing the eact settings - or it is the sleep bug.

4. There have been no WX7100 or RX480 MetalBench result posted with more than 165-175 MRays/s - you should make a screen shot of your 240 MRays result and post it.

Your former posts were unfortunately full of little errors. You must understand I cannot trust your claims here unless you can prove them! This is all about facts.

I flashed your bios video card from the first page. Works well.
One thing surprises me is that it works faster without a loader. I wrote the line -no_compat-check in EFInvram, that you can safely delete Opencore and safely run Big Sur.
There were minor mistakes in the previous page - I was inattentive, in a hurry. And now I am attentive. Tomorrow I will have time, I will delete Openkore and test and send the facts with screenshots. I have a history of Valley 1696 in the Monterey system.
I put a patch for 6970 in BigSur. She works.

 

[idenis42]

Windows 8.1

 

[Ausdauersportler]

Windows 8.1

View attachment 1865114

Amazing. Windows 10 uses DirectX and gets higher values. This only shows that the Windows 8.1 implementation of DirectX is more efficient than the macOS one for OpenGL. For this reason Apple decided to develop metal ….

 

[idenis42]

Amazing. Windows 10 uses DirectX and gets higher values. This only shows that the Windows 8.1 implementation of OpenGL is better than the macOS one.

I've tried DirectX11 - 4201
I've tried Opengl - 3574
I see the difference.
OK. Tomorrow I will test and send the facts.

 

[Ausdauersportler]

I flashed your bios video card from the first page. Works well.
One thing surprises me is that it works faster without a loader. I wrote the line -no_compat-check in EFInvram, that you can safely delete Opencore and safely run Big Sur.
There were minor mistakes in the previous page - I was inattentive, in a hurry. And now I am attentive. Tomorrow I will have time, I will delete Openkore and test and send the facts with screenshots. I have a history of Valley 1696 in the Monterey system.
I put a patch for 6970 in BigSur. She works.

View attachment 1865101

This is a complete unexpected result. On the first post in the AMD Polaris table are two BIOS columns, please flash and use the newer one form the second BIOS column.

Fortunately my own WX7100 is used by @internetzel, he did the latest vBIOS mods. All work is his own.

 

[unclemiltie]

It happened to me on my 12,2 imac with k3100m... the problem was power supply. i changed the power supply and all is well.

Very interesting.... I never had an issue with the 6970 (or 6790, I don't remember) in the system. Only since I put the K3100M into it. I might try a new power supply although this isn't bothering me all that much, like I said i just never let it go to sleep!

 

[internetzel]

Without bootloader: MacOSX 10.13.6: Valley - Score 2976, FPS 72.
MacOSX 11.6: Valley - 2701, FPS 64. MetalBench - 179-240 MRays

With the OPENСORE loader: Mac OS X 10.13.6: Valley - 2974, FPS 71.1
Mac OS X 11.6 - Valley - 1696, FPS 40.5. Metal Bench - 110-167 MRays

On the macOS X 12 system, it is also slow through the bootloader.

This is how it works for me. Even AMD 6970 native also lies like that in BIG SUR... For example, in the system 10.13.6 shows 15 FPS. In the 11.6 system, it shows 4 FPS.

OpenCore breaks the video card! What exactly is interfering inside OpenCore?

So, you can actually boot your 2011 iMac into 11.6 without using OpenCore?
In that case you won't have audio - and that has an impact on the valley scores, if I remember correctly.

 

[crogj]

I was trying to flash my imac 2011 21.5' with gtx765m with the modified @xanderon boot disk in #13624 of this thread.
The first time I can't find the directory therefore redownloaded and replaced the files in the sd card. Now I can't even remote access. Below are the codes for remote access. Is there anything I can do to flash the card again?


Last login: Mon May 24 12:58:30 on ttys000 andrew@Andrews-Air ~ % ssh root@192.168.1.187 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that a host key has just been changed. The fingerprint for the ECDSA key sent by the remote host is SHA256:XH4HFKWMug8xMAX3O6e7dJsXzmAm+QXPe23vEJ0C9FA. Please contact your system administrator. Add correct host key in /Users/andrew/.ssh/known_hosts to get rid of this message. Offending ECDSA key in /Users/andrew/.ssh/known_hosts:1 ECDSA host key for 192.168.1.187 has changed and you have requested strict checking. Host key verification failed.

I have the very same message, did you find a solution to this?

 

[Ausdauersportler]

I have the very same message, did you find a solution to this?

Read the full error message the just delete the file mentioned there It contains IDENT strings from former connection attempts.