Skip to content
MappleCare Community ↗

MappleCare Community

[Solved] How to fix Restore Error {err} in Finder / iTunes caused by NAND communication timeout during early bootloader initialization on iPhone 16 Pro Max

Find answers from other Apple users or start a discussion about your device.

All Forum Rooms

Home › Forums › iPhone & iOS Help Desk › [Solved] How to fix Restore Error {err} in Finder / iTunes caused by NAND communication timeout during early bootloader initialization on iPhone 16 Pro Max

Viewing 2 posts - 1 through 2 (of 2 total)
  • Author
    Posts
  • November 15, 2026 at 5:00 am #20017
    Linda Gonzales
    Community Contributor
    Diagnostic Hardware Specs: iPhone 16 Pro Max | OS Version: iOS 18.0.1 | Archive Source: Apple Support Community #256161826

    I am running into a persistent issue on my iPhone 16 Pro Max running iOS 18.0.1.
    Whenever the machine encounters NAND communication timeout during early bootloader initialization, the following diagnostic log appears in Console:

    AOSKit: [Restore] Device state transition failed: result code 9 during secure boot image verification

    I verified that hardware connections are intact and tested across different power sources. What is the verified diagnostic procedure to permanently eliminate this symptom?

    MacBook Pro 16″ M3 Max (128GB) | iPad Pro 11″ M4 (Apple Pencil Pro) | Kyoto, JP
    Computer Science & Machine Learning Student | "Verified Apple Discussions Archive"
    November 15, 2026 at 5:01 am #20018
    Sharon Scholz
    Community Contributor
    Apple Recommended / Verified Community Solution
    This canonical solution was verified and marked as solved in the Apple Support Community archive.

    Direct Thunderbolt connection, forcing true DFU mode, and executing an in-place software update or Configurator revive.

    Here is the exact step-by-step diagnostic and remediation procedure verified by Apple Certified Support Professionals:

    1. Never select ‘Restore’ if data is unbacked-up; always select Update.
    2. Use an authentic Apple USB-C 60W/240W cable connected directly to Mac ports (no hubs).
    3. Enter true black-screen DFU mode and execute an Apple Configurator Revive Device pass.

    Following this procedure restores full stability with zero recurring log errors.

    MacBook Air 13″ M3 (16GB) | iPhone 16 Pro (512GB) | AirPods Pro 2 | Lisbon, PT
    Apple Certified Support Professional (ACSP) | Digital Nomad & Travel Filmmaker
  • Author
    Posts
Viewing 2 posts - 1 through 2 (of 2 total)
  • You must be logged in to reply to this topic.