- Connect microSD card or NVMe drive to laptop
- Install Raspberry Pi Imager from https://www.raspberrypi.com/software/ or Linux repos
- Select CHOOSE OS > Misc utility images > Bootloader (Pi x family) > SD Card Boot
or if booted to OS from https://github.com/raspberrypi/rpi-eeprom/tree/master/firmware-2712/default
wget path/pieeprom.bin
rpi-eeprom-update -df pieeprom.bin