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Hi all,
My iMac currently has Thunderbolt bus firmware version 22.1, while running OSX Mavericks. I have seen other machines running version 25.1 .
Also, there are no more updates in the app store for thunderbolt, i have downloaded all of them. latests installed is update 1.2. Any ideas how i can update my Thunderbolt bus firmware to version 25.1?
kind regards,
Erik
iMac, OS X Mavericks (10.9), mid 2011 model iMac
Run Software Update, if your system tells you need it then you do, if not then forget about the update.
Hi rkaufmann,
thank you for your reply. i have aleady run it until there are no more updates. Unfortunately, i did not get the firmware update.
The reason that i am asking is because i suspect that the 22.1 firmware version is incompatible with version 25.1 when trying to connect two iMacs via thunderbolt. They are not detecting eachother.
IDo you know of any way to force the bus firmware update to get it to 25.1?
With due respect, please re-read my original post. Those are the instructions, it is just that simple. Believe me you do know better than the Apple engineers. 🙂
Please enjoy the best of-luck. _I_ never need to mess with Firmware.
Hi rkaufmann and bob,
Okay, lets say that i should never mess with the firmware. And then change the question to what i wish to achieve instead of how to solve what i think is the issue.
How do i get my 2 imacs to detect eachother via a connected thunderbolt cable? i know the cable works and that my iMac with firmware version 25.1 works, because i have connected those successfully to an iMac of a colleague.
If i connect the same iMac to my other iMac with firmware version 22.1 with the same thunderbolt cable, the iMacs do not detect eachother. So how can i fix that?
What exactly are you trying to achieve? Connecting the two machines via Thunderbolt (assuming both have Thunderbolt inputs) will only allow you to use Target Display Mode.
Hi rkaufmann,
Yes this is exactly what i wish to achieve. Currently i have two iMacs on my desk, but i wish to use one as an extended screen.
Then all you need to do is read Target Display Mode: Frequently Asked Questions (FAQ)
I have read the the FAQ again. Both iMac's should work ... mid 2011, running mavericks, both have thunderbolt ports.
cmd + f2 does not work, and when viewing system information > system report > hardware > thunderbolt , it reads port: no devices connected.
Can i somehow verify if the thunderbolt on my second mac is working or not?
Reset the SMC and PRAM on each machine 2-3 times, then retry. Instructions are: Intel iMac SMC and PRAM resets
Hi rkaufmann,
Thank you very much! your solution solved the issues i was having!
You're welcome.
Hi rkaufmann
I bought a Imac 27 2.9GHz and a thunderbolt / firewire adapter to use my lacie firewire external drive. But the external drive is not recognized. I tried another cable from a friend and did not work which excludes the possibility of the cable being damaged. Did the procedures you suggested above and neither worked. Ah! And also again tested the Hard Drives on my macbook with firewire input and works perfectly. Can you help me?
How to update Thunderbolt firmware
