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The reason your display is blank is most likely because R8911 was removed, while NOT performing a full permanent hardware bypass of the gMux IC. This is an absolutely terrible solution, as when that NVRAM variable gets reset, this is exactly what happens -- You get no video on the display at all. The BEST possible thing you can do with one of these machines is flash my custom gMux IC firmware, which permanently disables the defective AMD GPU, and of course does NOT rely on any easily-resettable NVRAM variables. I have not yet released the firmware, as I am still working an a flashing program and custom cable/solderless connector to make it easier for most people to actually perform the flash. Currently, though, I do offer mail-in flashing services, if that's something you'd be interested in doing. Flashing this firmware would fix your blank display issue more than likely.
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No, you should NEVER, EVER remove R8911 without doing a FULL, permanent hardware bypass of the dGPU, either by bypassing the gMux IC entirely, or flashing my custom firmware onto it. Removing R8911 WITHOUT doing a full bypass, or setting that "gpu-power-prefs" NVRAM variable will simply result in a display that does not show video.
Thanks for your reply.
Unfortunally as I said I cannot effort it to send it to you and I live in germany which would everything even more expensive... since I am a student at the moment... . :/

Anyway as I already mentioned before also, I don't want to accuse anyone, but since I had those annomalies I fixed them with the Post from AppleMacFinder and did then the Mojave things...which kinda worked. And once more something caused this issue and it happend AFTER updating the version 10.14.4 and doing your tutorial, which I posted... . I did a mistake with the openGL patcher since jackluke explained me the procedure afterwards. It then lost his soul...and once more it never happend before, it is maybe cause I did something wrong while installing the stuff, but in my opinion I think that something happend and disabled or crashed the AMD Graphiccard.
Of course this Card is broken but for me it doesnt make any sens that 2 mins ago it got recognized, and then I made those updates and then it went down... . and no Displaycolors are coming up. After doing this installation with the SSD with Mojave on it at my MBP 13" 7,1 it did the same thing by showing me just the white LED and a blackscreen. Lucky I could turn it off and then it started normally... . But maybe there is a "mistake" that came into the patcher or something. Thats what I could like to point out.

Anyway I really love that community here and the work that you did and still do, everyone of you and your patient to everyone that comes in here! Keep that up!

I would like to know how much money does this fix up cost me approximatly to get my MBP 15" 8,2 again working?

And yes I did nothing to my logic board yet and never did before... .

No, firmware flashing on that MBP could be done only through external EEPROM tool, and I guess it's not that the issue, but it's a broken AMD/ATI dGPU that needs to be deceived by removing a resistor.

well but that is the dosdude1 new way how to fix right? and actually it should fix my problem it seems or?
Its not a cool situation for me at the moment, since actually I need to write some stuff at my MBP for university. :/ The data is not gone thats cool for sure, but not handy to work on one MBP with my GF together, since she is also doing her final Paperwork :/
Would like to fix this situation as soon as possible... classic dilemma - I guess :D
 
Thanks for your reply.
Unfortunally as I said I cannot effort it to send it to you and I live in germany which would everything even more expensive... since I am a student at the moment... . :/

Anyway as I already mentioned before also, I don't want to accuse anyone, but since I had those annomalies I fixed them with the Post from AppleMacFinder and did then the Mojave things...which kinda worked. And once more something caused this issue and it happend AFTER updating the version 10.14.4 and doing your tutorial, which I posted... . I did a mistake with the openGL patcher since jackluke explained me the procedure afterwards. It then lost his soul...and once more it never happend before, it is maybe cause I did something wrong while installing the stuff, but in my opinion I think that something happend and disabled or crashed the AMD Graphiccard.
Of course this Card is broken but for me it doesnt make any sens that 2 mins ago it got recognized, and then I made those updates and then it went down... . and no Displaycolors are coming up. After doing this installation with the SSD with Mojave on it at my MBP 13" 7,1 it did the same thing by showing me just the white LED and a blackscreen. Lucky I could turn it off and then it started normally... . But maybe there is a "mistake" that came into the patcher or something. Thats what I could like to point out.

Anyway I really love that community here and the work that you did and still do, everyone of you and your patient to everyone that comes in here! Keep that up!

I would like to know how much money does this fix up cost me approximatly to get my MBP 15" 8,2 again working?

And yes I did nothing to my logic board yet and never did before... .



well but that is the dosdude1 new way how to fix right? and actually it should fix my problem it seems or?
Its not a cool situation for me at the moment, since actually I need to write some stuff at my MBP for university. :/ The data is not gone thats cool for sure, but not handy to work on one MBP with my GF together, since she is also doing her final Paperwork :/
Would like to fix this situation as soon as possible... classic dilemma - I guess :D

Try these attempts, plug the MBP with MagSafe and power-on, let it powered for 15 minutes, don't power off, then try to press the keyboard CAPS LOCK and check if its led turns green example: https://i.stack.imgur.com/KChS4.jpg

if it turns green then maybe even on black screen your MBP is working in background and keyboard HID is responsive and so could be fixable from another Mac through an automatic prepared USB MacOS Installer (even a Lion one) with customized com.apple.Boot.plist I guess, or you can set a remote control through Ethernet cable from another Mac installing the proper apps on the same SSD you are swapping.

Or try if you have to use a thunderbolt adapter to an external display, maybe AMD/ATI GPU could wake up from there.

These to allowing you the set the nvram to use again the IntelHD3000 iGPU.
 
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I actually installed High Sierra on my iMac but got a security and of course my bad luck with macOS updates it just hangs on the first stage of the boot up and I just got off a 3 month internet suspension for exceeding my download and know getting close to a 6 month suspension as I have to do clean installs foe the past 2 weeks now looks like I might to wipe my hdd again and reinstall High Sierra again just frustrating as my MacBook s running 10.14.4 like a champ and its the same year as my iMac I am actually surprised I didn't break the glass I shoved it so hard off my desk
PM if you still need .3
 
Try these attempts, plug the MBP with MagSafe and power-on, let it powered for 15 minutes, don't power off, then try to press the keyboard CAPS LOCK and check if its led turns green example: https://i.stack.imgur.com/KChS4.jpg

if it turns green then maybe even on black screen your MBP is working in background and keyboard HID is responsive and so could be fixable from another Mac through an automatic prepared USB MacOS Installer (even a Lion one) with customized com.apple.Boot.plist I guess, or you can set a remote control through Ethernet cable from another Mac installing the proper apps on the same SSD you are swapping.

Or try if you have to use a thunderbolt adapter to an external display, maybe AMD/ATI GPU could wake up from there.

These to allowing you the set the nvram to use again the IntelHD3000 iGPU.
As soon as I am back at home I gonna give it a try! Thanks! Lets see... . But yeah... . I keep on trying. :D

EDIT: The only thunderbolt-adapter that I got is one to HDMI, would that be usefull? then I could put it on my TV or at a Monitor, or should it be just thunderbolt to thunderbolt?
 
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Hi guys,

I have been following this thread for some time now hoping that a fix for the HD 6770 would come to light as it has for other unsupported cards, however no such luck it seems. Is anyone working on porting the .kext driver for the HD 6xxx series cards to Mojave, or is this a lost cause now?

I only ask as I have a Late 2011 MacBook Pro 17" and I am not looking to lose my dGPU as I use it quite often for the odd old game and Windows use. Yes mine still works and I wouldn't dream of literally removing the circuitry for it just to get brightness control in Mojave. I do believe anyone who does this to a working machine is insane, even in final cut the dGPU makes a difference, so I don't understand the willingness to bastardise your laptop to run Mojave.

But again I am just curious if any work is being done towards supporting the older cards. Just seems a shame that machines with old 8600GT chips can run Mojave, but not the one generation too old 6770m.

Thanks for reading and keep up the great work guys. I'll keep following this interesting thread all the same.

Any progress?
 
As soon as I am back at home I gonna give it a try! Thanks! Lets see... . But yeah... . I keep on trying. :D

EDIT: The only thunderbolt-adapter that I got is one to HDMI, would that be usefull? then I could put it on my TV or at a Monitor, or should it be just thunderbolt to thunderbolt?

In the thunderbolt guide it's reported to support DVI, VGA, dual-link DVI and HDMI so I think it's useful maybe better connecting to a Monitor, but first check if you can have the keyboard "caps lock" with green led.

These are just attempts to make it power on, in any case with an hardware logic board fix your machine is recoverable.
 
so funny? BTW, if iMac 10,1 removed GLDriver. seems that will not boot into system?

iMac with Nvidia or AMD/ATI GPU ? Which GLDriver do you have removed ?
However in general removing GLDriver does allow to boot to the system, it's equivalent to safe mode.
[doublepost=1554304252][/doublepost]Meanwhile I have managed to boot 10.14.5 beta 1 from Dual Graphics GPUs Mac, still only FrameBuffer, no Video Acceleration yet, but one small step.
 
iMac with Nvidia or AMD/ATI GPU ? Which GLDriver do you have removed ?
However in general removing GLDriver does allow to boot to the system, it's equivalent to safe mode.
[doublepost=1554304252][/doublepost]Meanwhile I have managed to boot 10.14.5 beta 1 from Dual Graphics GPUs Mac, still only FrameBuffer, no Video Acceleration yet, but one small step.
Excellent! Thanks for your hard work. How did you get to boot from duals? Have you applied the .3 patches?
 
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iMac with Nvidia or AMD/ATI GPU ? Which GLDriver do you have removed ?
However in general removing GLDriver does allow to boot to the system, it's equivalent to safe mode.
[doublepost=1554304252][/doublepost]Meanwhile I have managed to boot 10.14.5 beta 1 from Dual Graphics GPUs Mac, still only FrameBuffer, no Video Acceleration yet, but one small step.
iMac with AMD 4670 256mb ram.
i have not deleted, because i have no HDD space to backup my system..
 
Excellent! Thanks for your hard work. How did you get to boot from duals? Have you applied the .3 patches?

It's the beginner's luck, I just used the .4 GPUWrangler.framework, stock .5 IOGraphicsFamily.kext and IONDRVSupport.kext , but IntelHD seems not detected properly, have to check.
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iMac with AMD 4670 256mb ram.
i have not deleted, because i have no HDD space to backup my system..

Better to have a broken screensaver than a broken system, anyway Flurry is nice.
 

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It's the beginner's luck, I just used the .4 GPUWrangler.framework, stock .5 IOGraphicsFamily.kext and IONDRVSupport.kext , but IntelHD seems not detected properly, have to check.
How about a .5 configured the way you have it, with the .3 GPUSupport and OpenGL?
 
How about a .5 configured the way you have it, with the .3 GPUSupport and OpenGL?

Even without them replaced I can still boot also from a C2D, but noticed they are required to use safari otherwise many websites crash, and also some apps will show an incomplete UI, so are required. By the way I'm using 90% of the Extensions from .5 , just replaced IOUSB* and few other and removed telemetry.plugin for C2D machines.
 
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@ASentientBot can you make an example of making root's .profile as "nvram ... && reboot" ?
I need to execute a shell script from "single user mode" but I don't know exactly how to do it. Probably converting the shell script to a binary exec will work, but I'd want a simple shell script running from single user mode and possibly automatically without typing.
Just write any sh script to /var/root/.profile and it should execute when the system drops you to the root shell in single-user mode. Be careful though, if you put logout, reboot, or shutdown, since you might effectively "lock yourself out" of single-user mode.
 
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Even without them replaced I can still boot also from a C2D, but noticed they are required to use safari otherwise many websites crash, and also some apps will show an incomplete UI, so are required. By the way I'm using 90% of the Extensions from .5 , just replaced IOUSB* and few other and removed telemetry.plugin for C2D machines.
Cool. So .3 GPUSupport+OpenGL is still required. Food for thought... Thanks.
 
Just as a proof, since things are easier on an i5 cpu, the same results I achieved on C2D, and yes I use the same external spinning drive for my tests. I moved the same external drive to MacBook 7,1 I'm typing from here, no cheating.

Forgot to say: I am NOT using NDRVShim.kext , or any other dosdude1 Mojave automatic patches for this test, only performed a manual patching. I started from a clean 10.14.5 beta1 with stock Extensions and stock Frameworks.
 

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Oh my dog! I have mixed up some things not know exactly what and now on dual GPUs MacBookPro 2010 I got some kinda of transparency, here is the result, maybe IntelHD bring partial OpenGL Accel, I have to investigate.
 

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what Mac do you have you might try the kexts on page 136 I think the ones I posted above are from macOS El Captain the ones on page 136 are from High Sierra that's how I got my isight working in the early macOs Mojave beta's :)
hi again. I tell u the steps:
1) I used kext utility and put every kext (5) you told me one per one.
2) i booted into usb with dosdude1´s post patch, patch and rebuild caches.
3) i booted in my hdd. the last patch updater (1.3.0) tells me update legacy isight. I do.
4) reboot again and nothing happens

EDIT: one question: the last version that worked on imac9,1 was El Capitan. I show u my imac picture. Idon´t know what more can I do o_O
 

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Oh my dog! I have mixed up some things not know exactly what and now on dual GPUs MacBookPro 2010 I got some kinda of transparency, here is the result, maybe IntelHD bring partial OpenGL Accel, I have to investigate.
This gives me hope that we may be able to fight the tyranny of Apple. I was going to take a crack at this but I have a problem with procrastinating (I don’t think I’m alone in that.) so I haven’t done it yet. I’ll install 10.14.5 beta 1 tomorrow and wait for your instructions to get it working with this... what seems to be... transparency without the blurred effect?
 
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This gives me hope that we may be able to fight the tyranny of Apple. I was going to take a crack at this but I have a problem with procrastinating (I don’t think I’m alone in that.) so I haven’t done it yet. I’ll install 10.14.5 beta 1 tomorrow and wait for your instructions to get it working with this... what seems to be... transparency without the blurred effect?

Swapped the same external drive to a Macbook 7,1 and no transparencies, so I believe some kind of OpenGL transparency can still be achieved with IntelHD Videocards, I'll do other tests, but I do have on the same drive a patched 10.14.4 with dosdude1's patch, and it does have OpenGL acceleration and transparencies, it is enough stable but the truth is if I'd advise which version use today on unsupported Mojave mac definitely the 10.14.3 .

Anyway you can upgrade and with Macbook 7,1 can achieve a basic acceleration and use the GUI overall, and I have to say that C2D is not at all slow, it acts almost like an i5 cpu w/o Acceleration, so fairly usable for testing.

Another fact that on my tests I used a spinning disk not ssd, so very slow in rebuilding kextcache and so on.

edit:
I noticed you added the other mac pictures, the main page look better.
 
So anyway I did a big mistake..since I thought I can just update my stuff easily to 10.14.4. But it didnt work out... . The DosDude1 Patcher showed me some stuff that I should install and I did...but in fact then I had the message from my system, that I still have a update missing so I did update it via the normal systemupdate function. Now my system gets freezed while getting booted and also does not allow me to boot into recovery mode. I am kinda...*ucked... . :/

What is the best and smartest way to proceed now?

I cannot use my Mac at the moment as I mentioned. So it just shows me the forbidden sign after I try to boot into cmd+r (recovery mode).
Also letting it boot into the normal mode is just loading sign and getting freezed... . :/ Thought I can update normal via the patcher or/ and via the dosdude1 patcher :/
any suggestions?

thanks in advance!
Hi.
If I understand you correctly, I have the same issue with gpu in my mbp17 2011.
Before mojave I did software fix after every update, but since 10.14 I lost cmd+r too and wonder if there's a way to bring it back.

Anyway, to fix your problem you need to follow this instruction. That assumes you need two usb drives, one with ArchLinux, and the other is the one you were using to update to 10.14.x, you can use terminal from there instead of cmd+r for the third step. If you have no such pen drives, you'll need to find another mac to create them. It worked for me.

sorry if it's not related to you problem, I'm too lazy to read all your posts.
 
Macbook Pro 6,2 (mid-2010), already running Mojave 10.14.3 thanks to the Patcher:

Used the new 1.30 version of Patcher tool to download the installation app for 10.14.4, created the USB stick, booted with the stick, started the install process to the internal SSD (APFS). After some time of churning, a message window appears "Unable to install ..."
What did I do wrong?
 
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