Disks

iso handling

alpine (rpi4) bootable disks

Partition the target

diskutil partitionDisk <target disk> MBR "FAT32" ALP 2GB "Free Space" SYS R

and then make sure to set it for booting

sudo fdisk -e <target disk>
> f 1
> w
> exit

Unpack the tar payload in the /Volumes/ALP directory, and

vim usercfg.txt
---
enable_uart=1
gpu_mem=32
disable_overscan=1

cloud ready

To create a cloud-init ready iso on macOS, place "user-data" and "meta-data" in a configs/ directory (or any name)

hdiutil makehybrid -o init.iso -joliet -iso -default-volume-name cidata configs/

(make sure to specify -joliet -iso because otherwise macOS will try to use -hfs which many systems will not have installed/ready)

mount/unmount

an iso can attached or detached via hdiutil

hdiutil attach <file.iso> -mountpoint /Volumes/mymount
# and then
hdiutil detach /Volumes/mymount

Updated: 2021-10-21