Prints all non-system users, their home directory, and the size of the directory in human-readable format.

List User Directory Sizes.sh

#!/bin/zsh

for user in $(dscl . list /Users UniqueID | awk '$2 >= 500 {print $1}'); do
    userHome=$(dscl . read /Users/"$user" NFSHomeDirectory | sed 's/NFSHomeDirectory://' | grep "/" | sed 's/^[ \t]*//')
    if [ -d "$userHome" ]; then
        size=$(/usr/bin/du -h -d 0 "$userHome" 2> /dev/null | awk '{print $1}')
        echo "$user:$userHome:$size"
    fi
done