Latest update is not MacOS friendly - lsblk doesn't exist re: flash-jetson-image.sh

[jmspring]

The method used to determine block devices in flash-jetson-image.sh relies on lsblk which does not exist in macOS and further isn't installed by brew install util-linux. The flash-jetson-image.sh should be extended to detect OS and handle accordingly.

[jmspring]

I like the update, especially prebuilt images. I will look at a PR for this a bit later this week.

[pythops]

Thanks,

Yeah, I think it would be great to have one solution to flash the images on all different OS. A fix is coming

[pythops]

fixed