Overview
- Owners report that installations appear to complete, the machines reboot, then return to macOS Sequoia 15.7 instead of running Tahoe.
- Attempts to update via Software Update, Safe Mode, and Recovery Mode all produce the same failure.
- User reports in Apple Support Communities indicate the problem affects Mac Studio systems equipped with the M3 Ultra chip.
- One user’s log review suggests the installer loads an Apple Neural Engine driver before a hardware check fails and aborts the process.
- There is no known workaround, leaving affected users to wait for an Apple-issued update or installer patch.