820-3435-B (APFS support)

[KC Micro Tronix]

I purchased 12 820-3435-B boards on eBay. I have fixed two of them so far and none of them have APFS support. These are all 1.3Ghz 4G boards. I am using one right now on my bench to type this. Each one was locked and I have removed that but now I need to add APFS support to them. When I sell them it will be a huge mess if they don't have APFS support.

I am running El Captain 11.3 on my tech drive and that is the drive I am using now.
Is there a bios update I can run on these?

 

[2informaticos]

Take an empty SSD (or no important data) and do fresh install of HS, or Mojave.
MUST be done on INTERNAL SSD!

 

[KC Micro Tronix]

I can't flash the machine? I have to install the OS? I have 12 boards to do. That will take a long time.

 

[2informaticos]

Once you get one machine working, read the BIOS and flash it on the others.
Do NOT forget to CLEAN ME region on each machine after that!
You should also replace SVS area (SN) and fix checksum at the end.

 

[KC Micro Tronix]

what is the SVS area? I ordered a Medusa but it has not come in yet.

 

[2informaticos]

There is the serial number...

 

[2informaticos]

Mea culpa, is Fsys area...
You should replace entire block between Fsys and $SVS strings in BIOS; BEFORE SVS area...

 

[KC Micro Tronix]

Do you recommend a good website or youtube channel that covers all of this?

 

[2informaticos]

Medusa manual should be good enough, when you get it.
Search on the forum, we discussed many times about changing serial number in correct way.