Need to Edit Vbios on Hex level BGA SWAP Macbook

[macattack600]

How would I know how to edit hex of laptops internal vbios?

[jasko_jacker]

Re: Need to Edit Vbios on Hex level BGA SWAP Macbook

For what purpose ?

[macattack600]

Re: Need to Edit Vbios on Hex level BGA SWAP Macbook

I changed the GPU from to 7700m from 6770m with rework station BGA pinout exactly the same , I get blackscreen but keyboard lights up ,the job is done right I've done many
No external monitor tried other case same thing.

I'm thinking all I need is the AMD7000Controller.kext I have idea how to get to terminal