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

[snackbar]

Hi everyone. I'm going to replace my CPU with i7-2600, my GPU with WX 4150 from AliExpress. I would appreciate your recommendations for paste / thermal pads for the GPU. Kind regards, -trifle

Hope you mean the 2600s. K5 pro for the VRAM and K4 thermal paste for the die on the card. But you need to modify the heatsink for the WX4150 AFAIK. If you want to skip that, go for the WX4130. You might need copper shims for the right die height but only after measuring the actual height.

 

[internetzel]

@howardc64 I'll dig that up for you.

So I sent it. Flashed the EG bios again and rebooted. Got the HS picker and had the Sonoma stick already in. Went for install after wiping the SSD which was already formatted in AFPS. Install went smoothly from what I could see.

Had to go away for a bit and came back to a black screen with backlight on. Mouse movements did nothing, so did keystrokes. Tried to SSH into it, failed - so new OS was installed. Turned off the machine, then back on, did PRAM reset, went for the picker, chose SSD - and got greeted with the FORBIDDEN sign (crossed circle).

Anything in the OCLP settings besides selection for a 12,1 machine I should choose?

You need to boot using OpenCore; that means using the Apple native boot picker you need to choose to boot from the "Sonoma stick", which will launch the OpenCore boot picker.
From there you need to select the installed macOS on your SSD or the macOS installer in case it's still there because of the interrupted installation.

After having booted into macOS (hopefully without needing to reinstall), you first need to install the post install root patches using the OCLP application, and (using the OCLP application) you should build and install OpenCore to your SSD in order to not having to boot into OpenCore using your "Sonoma stick" any longer.

 

[pcwizzul]

hi there everybody. is there a vbios for k1100m with lower gpu/nvram frequencies? my card keeps crashing and I tried in w10 with msi afterburner and it's a bit better downclocking both the frequencies. I don't care about performance.
thanks in advance!

 

[snackbar]

You need to boot using OpenCore; that means using the Apple native boot picker you need to choose to boot from the "Sonoma stick", which will launch the OpenCore boot picker.
From there you need to select the installed macOS on your SSD or the macOS installer in case it's still there because of the interrupted installation.

Reinstalled for good measure. Finished again on the black screen.

No boot into Sonoma possible. Got greeted with the folder with a question mark. Will try safe boot later.

After having booted into macOS (hopefully without needing to reinstall), you first need to install the post install root patches using the OCLP application, and (using the OCLP application) you should build and install OpenCore to your SSD in order to not having to boot into OpenCore using your "Sonoma stick" any longer.

Understood the workflow.

 

[howardc64]

Reinstalled for good measure. Finished again on the black screen.

No boot into Sonoma possible. Got greeted with the folder with a question mark. Will try safe boot later.
View attachment 2477075

Understood the workflow.

Assuming you checked AMD GOP Injection + Polaris? Anyway, unlikely your problem. Just double checking.

Sonoma installer should boot the iMac to setup screen (assuming you wiped the SSD and cleaned installed)

You use the word "HS picker" in post #22275 What do you mean by this? Does SSD have a bootable volume? if not, then iMac will boot USB OC which is a "boot picker" and necessary to pick the Sonoma installer. If SSD has a stock HS boot volume, then I think will boot stock boot picker and can only boot HS or USB OC but not OCLP Sonoma installer directly (need to boot USB OC, then pick Sonoma installer). But sounds like you got Sonoma installer kicked off. How long did the install take? (should be like 20+min) and saw repeated reboots? (necessary) Maybe take a video and speed up 10-20x for reference.

 

[snackbar]

„HS picker“ meaning the boot picker back when I had High Sierra on the SSD. Not anymore, wiped it again. No boot volume now, just a clean ssd.
Also build another oclp stick with AMD GOP and Polaris ticked now. Thanks for confirming my hunch, will report back tomorrow.