Flash error: hdiutil: couldn't unmount "disk2" - Resource busy #169
Description
Whilst running my flash command as follows;
flash \
--userdata setup/cloud-config.yml \
~/Downloads/ubuntu-19.10.1-preinstalled-server-arm64+raspi3.img
I get a sporatic error where my flash gets to the end and then fails with the following response:
Is /dev/disk2 correct? y
Unmounting /dev/disk2 ...
Unmount of all volumes on disk2 was successful
Unmount of all volumes on disk2 was successful
Flashing ~/Downloads/ubuntu-19.10.1-preinstalled-server-arm64+raspi3.img to /dev/rdisk2 ...
Password:
0+47533 records in
0+47533 records out
3115115520 bytes transferred in 109.241900 secs (28515757 bytes/sec)
Mounting Disk
Mounting /dev/disk2 to customize...
Copying cloud-init setup/cloud-config.yml to /Volumes/system-boot/user-data ...
Unmounting /dev/disk2 ...
hdiutil: couldn't unmount "disk2" - Resource busy
Something went wrong.
Not sure how to reproduce it however it happens at least 7/10 times I attempt to flash my card.