Languages

Thunderbolt Firmware Update 1.2: Keeps reappearing and Thunderbolt ports and Target Display Mode may not work

Symptoms

After installing Thunderbolt Firmware Update 1.2:

  • Thunderbolt ports may not work.
  • Target Display Mode may no longer work.
  • The update may keep reappearing as available for download. 

Resolution

This occurs when a self-powered Thunderbolt device (other than a directly-connected Thunderbolt display) is connected to a Thunderbolt port while installing the update.

To resolve this issue:

  1. Shutdown your computer.
  2. Disconnect all Thunderbolt devices.
  3. Wait 10 seconds.
  4. If you are using a Mac mini with a Thunderbolt display, reconnect the Thunderbolt display directly to your computer via the Thunderbolt port. Do not connect other Thunderbolt devices at this time.
  5. Restart your computer.
  6. If the Thunderbolt Firmware Update 1.2 is offered, download and install it and restart your computer when asked. If the Thunderbolt Update is not offered, the update has installed correctly.
  7. Reconnect all Thunderbolt devices.

Additional Information


Last Modified: Jun 19, 2013
Helpful?
Yes
No
Not helpful Somewhat helpful Helpful Very helpful Solved my problem
Print this page
  • Last Modified: Jun 19, 2013
  • Article: TS4579
  • Views:

    43885
  • Rating:
    • 27.0

    (774 Responses)
Start a Discussion
in Apple Support Communities
See all questions on this article See all questions I have asked