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

Top-ranking reply

HWTech

Community+ 2026

Level 9

76,450 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.

View in context

140 replies

Sep 26, 2025 12:28 PM in response to Boschje79

Yeah I've been reattempting every other day or so and it's still not working. Can't imagine we see anything for another week or so.

Sep 27, 2025 1:15 PM in response to ckh1272

I haven’t seen the error pop up but basically when I try to update it reboots and does seem likes it is updating but just doesn’t. I go back to Seqouia like nothing happened.

Sep 29, 2025 1:19 PM in response to Boschje79

Just successfully updated my system from 26.0.0 to 26.0.1. It's been a while since I have been able to do that on my Ultra without having an issue.

SWDanBro

Level 1

14 points

Sep 29, 2025 8:52 PM in response to Boschje79

Finally a fix and it works on my M3 Ultra, everything is fine! Thanks Apple

Sep 20, 2025 2:30 PM in response to Imagine

Imagine wrote:

Hi RaymondIdema

I need to keep everything (files, apps, etc) on my Mac Studio Ultra M3, and just update Sequoia to Tahoe. Do you know if Revive will work? I do have an M1 MacBook Pro running Tahoe. Thanks!

Imagine wrote:

Has anyone had any luck with Revive? That's my only choice.

If your Mac is able to boot & run Sequoia....why the rush for Tahoe especially if you need to keep working on this system?

And your post (1st part I quoted here) seems to imply you may not have a good backup since you are concerned about your data. If you don't have a good backup, then that should be your first order of business since there are a lot more new ways to permanently lose access to the data stored on the internal SSD of the recent Macs due to all of the hardware, software, and security changes.

If you do have a good backup (hopefully more than one if the data is that critical for you), then why risk everything on upgrading to macOS Tahoe at this time? It will have many launch day release bugs which may take weeks before Apple can patch & test them before releasing an OS update patch. And this is only for the OS issues.....what about compatibility issues with any third party apps you are using? It does not seem like you are ready to deal with these issues at this time...so avoid them by staying with Sequoia until the bugs are worked out & you are better prepared to deal with the transition.

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Can't install MacOs Tahoe on Mac Studio M3 Ultra