Create a bootable SDHC from a Mac

Prepare Partition

• Open disk utility
• Select your SD Card
• Click Erase in the menu
• Set Format to MS-DOS (FAT)
• Set Scheme to Master Boot Record
• Click the Erase button

Unpack files

• Open Terminal
• Check your SD Card is mounted (in this case named "ALPINE")
• Unpack files with sudo tar xf ~/Downloads/alpine-rpi-[...]-armhf.rpi.tar.gz -C /Volumes/ALPINE
• Eject disk, it should now be ready to be used in the Raspberry Pi

After initial setup

After this preparation you should boot the Raspberry Pi with a keyboard and a HDMI screen connected, login as root and run setup-alpine and lbu-commit.