820-4652 - BIOS

[Palhano]

I looked for the file in the forum, but I didn't find it.

This iMac arrived to format, but it has several errors in the installation and does not finish (An error occurred while updating firmware.
Quit the installer to restart your computer and try again.).

The only version that completes the installation is El Capitan, but without surfing the internet. High Sierra and Catalina give firmware update error. Big Sur doesn't even start the installation.

I installed Big Sur on an SSD in another Mac and put it back in, it works but slow and no internet.

Any tips? I thought I'd start by changing the bios.

 

[2informaticos]

Clear me A1416 820-4652-A.mx25L64.bin.zip

drive.google.com

 

[Palhano]

With new BIOS, same problem. I noticed graphical issues, icons cut off. Some help?

 

[2informaticos]

Then GPU problem...

 

[Palhano]

I imagined! After seeing the icons with problems. I didn't expect to have problems installing the system!

 

[Palhano]

Thanks a lot for the help!