How do I use a new-line replacement in a BSD sed?
In a shell, you can do:
sed 's/ /\
/g'
hitting the enter key after the backslash to insert a newline.
Another way:
sed -e 's/ /\'$'\n/g'
See here.
For ease of use, i personally often use
cr="\n"
# or (depending version and OS)
cr="
"
sed "s/ /\\${cr}/g"
so it stays on 1 line.