"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. After about an hour of using the machine, MacOS informed me that the update for Tahoe was available. Given how much I love MacOS 26 on my MacBook, I definitely wanted it on my Mac Studio. So, I okayed the upgrade."
"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 brand-new Mac Studio M3 Ultra with 96GB RAM became unusable after initiating a macOS Tahoe upgrade. The machine rebooted to a black screen and would not enter recovery mode. A September 2025 bug caused the installer to load the Apple Neural Engine driver, then fail a hardware check, aborting installation for most users but in some cases leaving the OS unable to load. The result can be a effectively bricked $3,700 computer. Recovery requires using macOS DFU Firmware Revive/Restore procedures, a complex and technical process to restore firmware and reinstall the OS.
Read at ZDNET
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