We have released a new beta test version of the Raspberry Pi bootloader. You might like to help us test it - if you’re happy using pre-release software.
It can be used to start the Raspberry PI imager application directly on a Pi 4 or Pi 400 by downloading it over the internet with an Ethernet cable. The hope is that you can download the software you need without having access to a working computer.
See this blog post for full details https://www.raspberrypi.com/news/networ ... -required/
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