eject_all_disks

# =======================================
# OS X — ONE CLICK — EJECT ALL DISKS
# =======================================
# Open Script Editor on OS X
# Copy and paste this file in
# Save As > Application
# Name it "Eject All Disks" 
# Drag created application to Dock
# Now you can eject all external disks with one click from Dock
# ???
# $$$ & faster get-out-of-house-with-laptop 
# ========================================

tell application "Finder" to eject (every disk whose ejectable is true and local volume is true and free space is not equal to 0)