Updater application will be installed in Application > Utilities
folder and will be launched automatically when you close this
installer.
Thunderbolt Display Firmware Update is available from Apple’s
Downloads website now or you can download from below direct download
link.
Thunderbolt Display Firmware Update 1.0 (923 KB) [http://
support.apple.com/downloads/DL1453/en_US/
ThunderboltDisplayFirmwareUpdate.dmg]
via pupuweb Blog [http://www.pupuweb.com/blog/apple-thunderbolt-
display-firmware-update-1-0-improve-stability/]