Raspberry Pi Imager is the quick and easy way to install the OnAirScreen Image to a microSD card, ready to use with your Raspberry Pi.
You can download the Raspberry Pi OS Imager here:

• Download for macOS
• Download for Windows
• Download for Ubuntu for x86

1. download the Raspberry Pi Imager
2. insert a microSD card into your cardreader
3. start the Raspberry Pi Imager
4. click CHOOSE OS and select "Use custom", then select the OnAirScreen.img file
5. click CHOOSE SD CARD and select the SD card you want to write the image to
6. press WRITE button