I’d try to boot something like the ubuntu installer and use dd...

My oldest macbook pro stopped taking macos updates, so it runs ubuntu now - but 
i forget which installer image used to do that.

M

--
Matt Billenstein
m...@vazor.com

> On Jul 8, 2020, at 11:14 PM, Yury V. Zaytsev <y...@shurup.com> wrote:
> 
> On Wed, 8 Jul 2020, m...@vazor.com wrote:
> 
>> Boot from a usb installer image and you can clear the disk and install to it.
> 
> Of course, I've tried that already with an USB installer for Catalina (APFS 
> support) and El Capitan (pre-APFS) - both installers panic on boot while 
> probing local hardware because as soon as they find the disk and try to read 
> the partition table something goes kaboom.
> 
> Internet Recovery leads to the same results, because basically it's just 
> another delivery way for the installer, but as soon as it starts booting 
> were're at square one.
> 
> Is there some way to zero the first blocks of the drive from EFI :) ? Like in 
> the old good days when Sun still shined, I could enter OpenBoot by pressing 
> the magic "Stop-A" button and enter the Forth interpreter to do stuff like 
> that...
> 
> -- 
> Sincerely yours,
> Yury V. Zaytsev

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