MP 1,1-5,1 No display after installing new gpu

[HeadstrongZodiac]

Hey all,

I recently bought an hd 5770 from ebay to upgrade my aging mac. I was going by greggant's guide, which is how I found this gpu. However when I installed it, I waited around 20 minutes, and no display. Is there any way to resolve this?

 

[JedNZ]

To help the community problem-solve this for you, include some info about your system (and add it to your signature):
Go to Applications>Utilities and run the System Information app.
Advise the Model Identifier, System Firmware Version and what macOS version you're running.
Advise what PCIe slot your GPU is installed in and any other identifiers on the GPU (make/model etc).

 

[HeadstrongZodiac]

I can't seem to find the firmware version, but it's running macos mojave (per dosdude1's methods) The gpu is in a 16x lane slot (first slot), and it's a dell hd 5770. I was aware I wouldn't have a bootscreen, but it doesn't show a screen at all

 

[Macschrauber]

You will need the legacy video patches for dosdude Mojave to run a HD5770 without framebuffer driver (per bootscreen / OpenCore / RefindPlus / whatever)

 

[HeadstrongZodiac]

How would I go about getting those? And what would be the process after that

 

[Macschrauber]

Run the patcher, set the option and let it patch.

Will need a working GPU if you dont have screen sharing active (what I very recommend for every Mac OS).