Thunderbolt Firmware Update 1.2 will not install. After installing, it just reappears in update tab on Mac App Store.

Hello there. I had the same issue and what solved it, was simply unplugging the Thundebolt display adaptor before doing the update and plugging it back when it finished.

Hope it helps someone. I was getting mad already with this update always popping up!

Cheers

JAC

Looks like it the app store.

Get the download directly then run it.

Here:

http://support.apple.com/kb/DL1653

Looking back at my posts in this thread, it looks like I had already tried the firmware update about 30 times and that was in June. I have tried at least 30 times since, both from the App Store and from the downloaded installer. I tried with something plugged into the thunderbolt port and nothing plugged into it. The power cord was never an issue as this is on an iMac. (I've worked in Apple software development since 1992, so I like to think that I'm at least somewhat competent at troubleshooting stuff on the Mac, and I was pretty sure I'd exhausted my troubleshooting options but was just too lazy to haul my big iMac to the GB.) Then this week I noticed for the first time in ages that there wasn't a notification badge on my App Store icon, looked in the App Store, and it appears that the install failed on the 26th and "took" on the 27th. I don't know if something changed on the App Store end, and I can't think of what changed on my end (I'd updated to 10.9.1 long before that), so I can't explain it.

I'm guessing there's some sort of life lesson about persistence somewhere in this story ... if you don't succeed, just try, try (x60) again?

Dawn,

Yes, despite it being somewhat illogical, I've also found that trying again and again does sometimes work!

Here it is Sep 2014, and this problem is STILL HAPPENING!!! I have an older macbook pro with the latest Mavericks. The APP store has the notification ⚠ that I need to do the firmware update for thunderbolt. I've done the update (with the power cord in place) and reset/reboot twice, seemingly without errors. But the badge is still there. ARGHHHH

APPLE???

I thought the update "took" several months ago because I stopped being prompted for it. Now, after the most recent Yosemite DP, it's back. I'm prompted to update the firmware, I elect to do so, the update fails without an error, and after restart, it prompts me to update the firmware.

I am in exactly the same situation - I have tried installing both through the app store and as a separate download over and over, even followed instructions on debugging the App Store to even try hiding the update but nothing works.... Have you had any luck at all?

For what it's worth, I was able to fix the problem by installing it via a shut down and start-up, rather than a restart. After the App Store finished the download and it prompted me to restart, instead of going ahead, I selected "Not Now," then manually shut down, waited a second, and started back up again. For whatever reason, it worked. Nothing else to that point had: power cable was plugged in, no Thunderbolt devices were connected, and I reset the SMC several times.

Im having the same problem as everyone else. I have tried over 40x times now.

it comes to the firmware update screen with the progress bar but abruptly shuts down before progressing.

its a 2012 27" iMac. I have tried absolutely all tips the people have posted here, aswell as anywhere on the internet. Absolutely nothing has done the trick. I want to use my thunderbolt ports again!!

One question though.. how do I know if I am actually resetting the SMC? On my macbook pro I can see the magsafe led changing but on the iMac there is no proof it worked.. maybe i am not doing it right and thats the problem.. who knows, any ideas?

also if I have el capitan installed then the downloaded installer isn't compatible and I have to install from the app store. So i am using yosemite. I have also tried on 10.8 and 10.9 versions.

I don't know if people are still having this issue i just got the new 5k iMac and i was using my thunderbolt display and it would not update no madder how many times i tried, so i then plugged the thunderbolt display and the AC power that it supplies to my MacBook Pro and i was able to update it through that and no problems. Hope this helps if this is still a problem for anyone.

I am also experiencing this problem. Any updates fellow mac users???? help!

tan feign, my thunder port just stopped working for a dual display setup? Did you get any resolution on your issue, did you have a similar issue? Pulling my hair out! thanks Kevin

I did the two updates with the power plugged in.

It still wants to install it again.

I got this error message:

Installing this package may damage your system, and the installation may fail. To stop the program and the installation, click “Cancel Installation”.

Oh, and under OS 10.11.13.16.131416 HIGH SIERRA.

LOL I get tired of all the numbers on the OS.