User profile for user: Boschje79
Boschje79 Author
User level: Level 1
87 points

Can't install MacOs Tahoe on Mac Studio M3 Ultra

When trying to update from Sequoia 15.7 to Tahoe 26.0 all seems fine at first. It prepares the update, then reboots, a timer starts running on how long installation will take. That runs down to "Less than a minute". Then then (without a reboot) I am back at the login screen of Sequoia. When I login I get the message that there has been an unexpected reboot.


The log says this:

panic(cpu 8 caller 0xfffffe0050ee4b08): "ANEHWDevice::Failed to validate ANE register offset 0x5a8 with expected value: 0x100000ff, read register value 0\n" @ANERegisterControl.cpp:177


I've tried default software update, downloading the full installer with the "softwareupdate" tool via the Terminal. Thing is, when I do a softwareupdate --history, it does show the failed updates:


softwareupdate --history


Display Name                                       Version    Date                  

------------                                       -------    ----                  

macOS Sequoia 15.4                                 15.4       31-03-2025, 21:35:44  

macOS Sequoia 15.4.1                               15.4.1     17-04-2025, 11:56:23  

macOS Sequoia 15.5                                 15.5       12-05-2025, 23:32:03  

macOS Sequoia 15.6                                 15.6       30-07-2025, 00:11:17  

macOS Sequoia 15.6.1                               15.6.1     21-08-2025, 15:04:23  

macOS Sequoia 15.7                                 15.7       15-09-2025, 19:40:59  

macOS Tahoe 26                                     26.0       15-09-2025, 21:17:05  

macOS Tahoe 26                                     26.0       16-09-2025, 00:19:57  

Safari                                             26.0       16-09-2025, 00:33:36  

macOS Tahoe 26                                     26.0       16-09-2025, 00:59:28  

macOS 26.0                                         26.0       16-09-2025, 01:35:02  

macOS Tahoe 26                                     26.0       16-09-2025, 02:29:16  


Never had any issue with MacOs Sequoia (updated to 15.7 first today without any troubles) so I suggest it is software. Any idea on how to fix this?

Posted on Sep 15, 2025 6:27 PM

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User profile for user: HWTech
HWTech
Community+ 2026
User level: Level 9
77,750 points

Posted on Sep 18, 2025 5:58 PM

ckh1272 wrote:

DFU is only for firmware revives or restore. OS installation is not an option that way.

A DFU Firmware Revive will reset the security enclave and system firmware. This should be updating the system firmware to the most recent firmware available which right now should be the macOS 26.0 related firmware.


A DFU Firmware Restore will do the same thing as the Revive, but will also reset the internal SSD and it will also push a clean copy of macOS onto the internal SSD. I don't know which version of macOS will be pushed onto the internal SSD with this process (I never really paid attention to it). I think it may be possible to use Apple Configurator 2 to push a specific version of macOS onto the internal SSD, but I'm not sure how that can be acquired.


Unfortunately a DFU Firmware Revive or Restore does require access to another Mac running macOS 26 Tahoe, or possibly for a little while macOS 15.x Sequoia may work as well with the latter perhaps requiring the use of Apple Configurator 2 (hopefully you already have the version compatible with Sequoia).


Here is an Apple article with instructions:

How to revive or restore Mac firmware - Apple Support


Something else must have been done, namely updated firmware (another user posted that is what an Apple Store did for them) before they upgraded you to Tahoe.

That is exactly what the DFU Firmware Revive or Restore process does. It reflashes the system firmware. Another user in this thread or another similar thread on this forum actually stated quite clearly the Apple tech performed a DFU Firmware Revive or Restore.


I can understand that post may have been missed by many people due to the horrible way posts are ordered on this forum with the default "Ranked" sort method. I would recommend people to change their forum profile to set the default sort order to "Oldest" or "Newest" as the posts will be ordered in actual time order. It is possible to change the sort order for only a single thread by looking at the lower right of the initial post (or just below the "Top-ranking reply") where there is a "Sort By" option with a drop down list box.


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User profile for user: Spamo51
Spamo51
User level: Level 1
8 points

Sep 29, 2025 6:14 AM in response to HWTech

I'm not a philosopher like you, and I installed MacOS Tahoe on my MacBook Air M4 and MacBook Pro M4. All applications work perfectly, and I only notice improvements in the performance of some (the graphics ones, which I use the most).


So why can't my most powerful computer, the Mac Studio Ultra M3, enjoy the benefits of a more powerful operating system?


It's as if a car manufacturer used an exceptional fuel in all its cars, but it didn't work in those competing in Formula1.


It's a bit like saying that Apple neglects professionals, since there are fewer of them than consumers.

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Can't install MacOs Tahoe on Mac Studio M3 Ultra

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