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iMac 17,1 (Retina 5K, 27-inch, Late 2015) EFI firmware update failures
- Thread starter zorinlynx
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Well, I also tried to use the built in SD card reader to upgrade the firmware. But it didn't work.
In my case the key was to have no SSD connected to the NVMe port, only using the SATA port.
Opening the iMac is of course a delicate procedure.
Hi everyone. I recently got this 17,1 1Tb fusion drive, still all original, unopened. I'm planning on installing a new blade soon, reading all day long these threads trying to understand all the details.
My firmware is at 429 now.
Should I worry that after the replacement the firmware will not longer be updated?
What problems can that cause anyway?
Sorry for the noobs questions. I accept this is a new territory for me, and would greatly appreciate it to be enlightened.
Thanks in advance!
My firmware is at 429 now.
Should I worry that after the replacement the firmware will not longer be updated?
What problems can that cause anyway?
Sorry for the noobs questions. I accept this is a new territory for me, and would greatly appreciate it to be enlightened.
Thanks in advance!
If your firmware version is passed 170, future updates seem to install as expected.
This confirned my suspicion, the issue is the stock SSD as I have the 17,1 unit stuck on the 170. Only my case the machine has a 3.2GHz I5 with stock 512G SSD, also OS updated to BS 1121. So the processor is not the issue, it is the firmware/SSD interface is borked in some manner, yet not a show stopper. However, through all updates from as far back as El Cap 10116 to now have operated as smooth as butter, so I haven't been all that motivated to jump through all these hoops. If I should begin to have wierd behavoir on this machine , this'll be a troublshooting to pursue.
Good work everyone! ? Everyone except Apple?
My bootrom shows some crazy version for some reason:
Boot ROM Version: 1554.80.3.0.0 (iBridge: 18.16.14346.0.0,0)
Boot ROM Version: 1554.80.3.0.0 (iBridge: 18.16.14346.0.0,0)
The latest Boot ROM versions I have seen are in the 429 range. The iBridge is new to me as well.
yes that's me!!! also slapped it on the apple twitter feed!EFI Bootrom stuck on 173.0.0.0.0 - Apple Community
discussions.apple.com
There's nothing crazy about this. This is what you see on a Mac that has a T2. Presumably you're using either an iMac Pro or 2020 iMac.
nope Imac 17.1 with no T2 chip. 512gb SSD and 32gb RAM, 4GB VRAM as when purchased!
Can you share a screen capture of the info from the System Report app, including the Mac model?
cant as on MacBook Air currently as away from the iMAC17.1 the EFI 173.0.0.0.0 I checked everything with third party software as in the this thread. multiple installs from Catalina, even after erasing SSD etc etc and no EFI update from 173.0.0.0.0 apple advised Big Sur update and that won't even update past 10 minute count down. responds with network error (which is BS). went to the apple forum to call them out and slapped it all over twitter with links to this thread!!!
Indeed I was. I missed that the person who answered me was not the person who posted the T2 data.
Yes, I have a 2020 iMac. How does it go from version 170ish to 1500ish?? That's a HUGE jump
There's no correlation or relationship whatsoever. The 2020 iMac has a T2 chip, which is the firmware version you're seeing on your computer. The 2015 iMac in this thread is a completely different architecture.
Sorry, guys, for going a bit off topic..
Isn't the ibridge the bootrom for T2 and the bootrom is the bootrom? I used to have a late 2014 iMac but sold it and never thought to check if the bootrom version was up to date. I guess this issue of bootrom not updating is very specific to the 2015 iMacs somehow?
Yes, this is exclusively related to a bug with 2015 iMacs. It does not appear to affect any other models, and seems to only affect 2015 iMacs that have SSDs.
The T2 is effectively all of the firmware for Macs which have T2s.
well, if it was a bug it would have been fixed (if software). However, as it is hardware then the question becomes did apple sell these products knowing there was a hardware issue? Also, blocking the firmware update would indicate they know its a hardware issue and by remaining silent probably reduces the any claims against them for sale of defective products (granted the defects are highlighted later). so it is ball in apples court so to speak as being the worlds most valuable company do they step up take ownership and set the standard or just allow the iMac 17.1 late 2015 user be second class customers.