On a sunny day (Wed, 30 Dec 2020 18:13:27 -0000 (UTC)) it happened Jim Jackson
 wrote in :

>On 2020-12-30, Jan Panteltje  wrote:
>> Just bought a PI4B 8 GB
>> Unfortunately it does not run SDcard images from my older PI4,
>> boot process hangs with something like 'use more modern software'.
>> It runs OK with 2020-12-02-raspios-buster-armhf-full.zip (just downloaded
from raspberry org)
>>
>> Web search talks about these 4B having a boot EEPROM..
>> This is a problem as there is a year or more of work in the current images.
>>
>> Whats up?
>
>Put the sdcard back into the older pi4 and run update on the operating system.
>
>apt-get update
>apt-get upgrade
>
>That should update the boot loader stuff and it should boot in the 8Gb Pi4
>
>I've done that before when upgrading Pi hardware.

Thank you very much, that worked!
It added 1.6 GB software / updates too, just enough left of my 10 GB G4 on the
last
day of the month...

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