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Reply To: Diagnostic query: Unexpected kernel panic on macOS Sequoia 15.1 after waking (1794697892)

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Home › Forums › iCloud, Apple Account & 2FA › Diagnostic query: Unexpected kernel panic on macOS Sequoia 15.1 after waking (1794697892) › Reply To: Diagnostic query: Unexpected kernel panic on macOS Sequoia 15.1 after waking (1794697892)

#14277
Daniel Hayes
Administrator

The AppleThunderboltNHI + IOPlatformPluginFamily panic signature indicates a Thunderbolt/DisplayPort dock firmware race condition during the D3cold-to-D0 transition, where the NHI controller fails to re-enumerate the PCIe tunnel before the PMU asserts kIOPMPowerOn. Filter the unified log for the exact wake sequence via log show --predicate 'eventMessage contains "TBTDPC" or eventMessage contains "NHI"' --last 24h --style syslog to isolate the IOThunderboltController::waitForOk2Go2Sx timeout. Update the dock firmware using the vendor’s Windows/macOS utility, then force a deep SMC/PCIe reset (sudo pmu reset on Apple Silicon; Shift+Control+Option+Power on Intel) to clear stale ACPI _PRW mappings for the TBT port.

Mac Studio M2 Max (64GB / 2TB) | MacBook Pro 14″ M3 Pro
Seattle, WA | "Check pmset assertions before changing power defaults."