set-screenshot-dir.sh

#!/usr/bin/env bash
# By default, Mac saves screenshots to the user's desktop. This simple script
# sets the directory screenshots are saved to turns off the screenshot
# confirmation popup. This script only works on MacOS.
#
# Example:
# ./set-screenshot-dir.sh $HOME/Screenshots

set -e

TARGET="$1"

if [[ -z "$TARGET" ]]; then
  echo "Must provide desired screenshot output directory."
  exit 0
fi

if [[ ! -d "$TARGET" ]]; then
  echo "Creating output directory ${TARGET}"
  mkdir -p "$TARGET"
fi

# Overrides location to store screenshot from desktop to provided directory.
defaults write com.apple.screencapture location "$TARGET"
# Skips the screenshot preview popup step.
defaults write com.apple.screencapture show-thumbnail -bool FALSE
# Restart UI server to take effect immediately.
killall SystemUIServer

Can run directly from gist using:

curl https://gist.githubusercontent.com/allancalix/a021a717a3d19fef251b958eb9643c33/raw | bash -s $HOME/Desktop/Screenshots