Diagnostic Reference

Apple Error Codes & Recovery Index

Structured lookup reference for Finder, iTunes, iCloud, and macOS Console error codes across iPhone, iPad, and Mac.

iOS / iPadOS Update & Restore

Communication timeout between Mac/PC updater host and device mid-handshake. Isolate USB-C hubs and choose Update before Restore.

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iOS / Apple Silicon Security / USB

Unexpected disconnect during iOS security signature or baseband verification step. Caused by high-resistance charge-only cables or USB suspend.

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macOS / Finder Filesystem / Sync

Parameter error during Finder file copy, exFAT drive writes, or Apple Devices sync due to invalid characters or stalled SMB locks.

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