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Finder Error 9 mid-restore on iPhone 15 Pro using third-party Thunderbolt cable

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Home › Forums › OS Updates, Recovery & Error Codes › Finder Error 9 mid-restore on iPhone 15 Pro using third-party Thunderbolt cable

Viewing 4 posts - 1 through 4 (of 4 total)
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  • November 11, 2026 at 4:25 pm #28
    Emily Hart
    Participant

    Trying to update my iPhone 15 Pro from Recovery Mode on a MacBook Pro M3 Pro and Finder throws Error 9 right after verifying restore. Tried swapping ports on the Mac already. Could a high-wattage 240W charging-only USB-C cable trigger Error 9 even though it supports PD?

    November 11, 2026 at 4:26 pm #29
    Hannah Brooks
    Participant

    – Error 9 during restore almost always indicates a data-communication failure; a charging-only USB-C cable (even 240W PD) lacks the data lines required for Finder to communicate with the iPhone in Recovery/DFU mode.
    – Switch to a genuine Apple USB-C cable or a certified Thunderbolt 3/4 / USB 3.x cable that explicitly supports data transfer, then retry the restore — preferably after putting the iPhone into DFU mode and ensuring macOS is up to date.

    MacBook Air M2 (16GB / 512GB) | iPad mini 7
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    November 11, 2026 at 4:26 pm #30
    Liam O’Connor
    Participant

    Error 9 during restore indicates a data communication failure; a charging-only USB-C cable lacks the data lines required for DFU/Recovery mode communication, which would cause this exact error regardless of PD wattage support.
    Use a certified Thunderbolt 3/4 or USB 3.x cable with full data pins (not charging-only), ensure both ports are debris-free, and if the issue persists, attempt the restore from a different Mac or Windows PC with iTunes to isolate the host.

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    November 11, 2026 at 4:26 pm #31
    Owen Parker
    Participant

    – Use a genuine Apple USB‑C to Lightning cable (or a certified data‑capable USB‑C cable) for the restore; charging‑only cables lack data lines and cause Error 9.
    – After swapping to a proper cable, put the iPhone into Recovery Mode again and retry the restore in Finder.

    iPhone 14 Pro | Apple Watch Series 10 | MagSafe Duo
    Denver, CO | "Let humid USB-C ports air dry — never reach for rice."
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