How to install bootloader using RPi Imager

Prerequisite

  • Download the bootloader image file for your board from KOS Developer Portal.
    • In Mac OS, the file is automatically unarchived, and the kos-installer.img file will be present in the download location.
    • In Windows, the user must unarchive the downloaded file and use kos-installer. img for flashing.

Raspberry Pi Imager

Download and Install Raspberry Pi Imager.

Raspberry Pi Imager
  • Download and Install Raspberry Pi Imager from here.
  • Access to the USB thumb drive/ SD card/ Raspberry Pi board you are flashing should be in USB boot mode.

Using Raspberry Pi Imager

  • Run the Raspberry Pi Imager program.

  • Click the “CHOOSE OS” button.
  • From the Operating System dialog, scroll to the bottom and select Use Custom.
  • Navigate and select the previously downloaded disk.img.gz file.
  • Click the “CHOOSE STORAGE” button.
  • Select the drive that represents the Raspberry Pi or storage device you use.
  • When ready, click the “WRITE” button.
  • Click “YES” at the confirmation popup. Writing begins, and the tool shows progress with a status bar:
  • The disk image is written on the selected device and verified, which takes a few minutes.