"Yesterday, I received my new Mac Studio M3 Ultra desktop computer. I decided to make the purchase because I was doing bigger and bigger video projects, and my Intel-based iMac wasn't up to the task. The new machine has 96GB of RAM and that screaming M3 Ultra chip. Yeah, it's gonna be blazing fast. As soon as it arrived, I began the process of unboxing everything, moving my iMac to another location, and setting up the Mac Studio. Everything went just fine... until it didn't."
"In September 2025, a bug was discovered where the installer loads the MacOS Tahoe driver for the Apple Neural Engine, but then a hardware check fails, and the installation process is aborted. Most users reported that the installation simply failed and rolled back to Sequoia. In my case, the installation wasn't aborted; it failed, and the OS was unable to load."
A new Mac Studio M3 Ultra became unbootable after an attempted MacOS Tahoe upgrade. The installer loaded the MacOS Tahoe driver for the Apple Neural Engine, but a hardware check failed and many installations aborted or rolled back. In this instance the installation failed without rolling back, leaving the operating system unable to load and blocking access to recovery mode. Standard reboots and recovery attempts did not resolve the issue and the machine appeared bricked. Recovery required performing a DFU Firmware Revive/Restore to restore firmware and reinstall the operating system. The DFU process is complex and technically involved.
Read at ZDNET
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