Thunderbolt Dock: Eject all disks prior to undock

My new Elgato TB2 dock comes with an installer for an undock utility, but it also installs a kernel extension for some other function. I need a kernel extension like I need a meth habit.

So I was looking at 3rd party Mac App Store solutions like Mountain.app when @clackgoble on app.net said to just do AppleScript. Google found one then I added Clark’s eject line. I saved it as “Undock.app” and I launch by Spotlight (Cmd-spacebar “und”).

FWIW:

-- http://irwinkwan.com/2013/06/27/eject-all-mac-os-x-disks-with-a-script/

try

tell application "Finder"

-- Original: eject the disks

-- Clark Goble version:

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

display dialog "Successfully ejected disks." buttons {"Close"} default button "Close"

end tell

on error

display dialog "Unable to eject all disks." buttons {"Close"} default button "Close"

end try

Update 7/23/2016

The above version may not be reliable in El Capitan (presumably an OS bug). I’m told this works:

tell application "Finder" to eject (every disk whose ejectable is true and local volume is true)