efi firmware

Hi People. I am trying to reprogram the bios EFI of Imac 2017 21,5 with ch341 programmer. Can you help me to identify the right chip! I will send a little image of what a guess is the one? MX25L6473EZNI ? Let me know Thank you Luigi Capaldi

hello, i have the amd hd radeon 7970, now i remeber seeing a video a few years ago you could flash the 7970 to get the mac bios screen on your mac pro. any idea how i can do it my self?

hello, im looking at upgrading my macbook pros gpu to 4gb. i know on the mac pros you can run a non efi flashed gpu to have open core as the boot screen. but my question is can i use any 4gb boot rom, to flash to the apple 650m gpu in my macbook pro and then get the 4gb of vram on there and then...

Sorry for a lengthy post. This is an uncommon situation for most people so please read only if the topic particularly interests you. I bought a used MacBook Air 7,2 (MBA1) last summer, which came with no SSD. I thought it was no biggie because it was my plan to install an M.2 NVMe SSD anyway...

Hi, I tried to understand the state of things as far as FileVault (aka APFS-Encrypted) on cMP units is concerned. Read some threads here and on MacVidCards' blog, and still confused. I have a MP4,1 updated to 5,1 with a vanilla RX580 and 10.13.6. Considering whether to update to Mojave or...

Hello guys. I have an upgraded Mac Pro 4.1 flashed to 5.1 Upgraded the graphic card with Nvidia Quadro K2000D and running Mojave. Quadro K2000D is running just fine, but i don't see the Disk icons when trying to boot from another drive. I think an EFI64 ROM is needed here. Can someone help me...

Gentle folks: Have been a regular user of the work of DOSDUDE1 and others in support of running current versions of macOS on older unsupported Macs, specifically on my MacBook Pro 4,1 (early 2008). Have upgraded my macOS version through Sierra --> High Sierra --> Mojave 14.0, the last shortly...

I have not been able to find a reference to the latest EFI. Mine is at 133.0.0.0.0 Based on the scheme this looks like a recent version. Is it the latest?

As of recent I have acquired a Mac Pro 2, 1. It can currently run all the way up to OS X 10.11 El Capitan, which is still a good OS, but isn't supported by Apple. Is there any possible way to get a Firmware Upgrade from 2, 1 to the 3, 1? There is fundamentally no difference between the two, as...