只需添加without altering line endings
(尽管这会添加一个尾随换行符)。
read -r -d '' script <<'EOF'
echo 1
echo 2
echo 3
EOF
osascript -e "do shell script \"$script\" with administrator privileges without altering line endings" | sed '$d'
# See:
# "do shell script in AppleScript",
# http://developer.apple.com/library/mac/#technotes/tn2065/_index.html
# ...
# By default, do shell script transforms all the line endings in the result to
# Mac-style carriage returns ("\r" or ASCII character 13), and removes a single
# trailing line ending, if one exists. This means, for example, that the result
# of do shell script \"echo foo; echo bar\" is \"foo\\rbar\", not the
# \"foo\\nbar\\n\" that echo actually returned. You can suppress both of
# these behaviors by adding the "without altering line endings" parameter. For
# dealing with non-ASCII data, see Dealing with Text.
# ...