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Is it OK to use software update? it's wanting to go to 11.6 and I do have a time machine backup in case of it going belly up.

Thank you all so much, I reflashed A20 and did everything to the letter creating installer as suggested. I'm going for a lie down I think I must have messed up the var instructions on my initial try and there were remnants. Thank you!

Oh I'm very sorry I had no idea, I'll delete it. I do have access to a real mac but an old one and if not I'll use Windows. I'll go and read the rules while I'm at it

Yes brand new battery, after bios reset the date goes back to that. I have changed it in setup now but the failure still sticks

I'm following the way you have instructed, pull battery, short pins, apply power, power press for 30 seconds etc, the clock is reset so I'm guessing it's correct? And after it being bricked it boots again. I have a virtual machine running big sur for all the legwork. I used that to make the...

Thank you so much, that EFI booted so I could see the text included, thankfully showing the error, I know this means the bios var files need adding in? but I have done this 4 times now and I'm left with a circular dell logo and no bios boot. I know this means I must be entering them incorrectly...

Well I appear to be stuck at the beginning of the install from USB, I can boot into the opencore boot menu: 1.install from external, but on opening that I get a white apple logo and the keyboard led shuts off after a few seconds and it just sits there. There are some txt files in the EFI...

I'm going to attempt this in a few days when all the parts turn up, I'm not too confident I'll get the bios efi folder things correct, hopefully people will be kind enough advise me. God help me