Comprehensive Apple Error Codes

Explore our extensive database of over 5,000 Apple Ecosystem error codes. From macOS to iOS, tvOS, watchOS, and visionOS, each code is presented with its name and a concise description to help you quickly pinpoint and resolve issues.

Whether you’re a developer refining an app or a user troubleshooting a system glitch, this resource empowers you with the knowledge to decode cryptic errors and find actionable solutions. No more guesswork—just clear guidance to keep your projects and devices running smoothly.

Number Name & Description Platforms Framework Header
-9807
errSSLXCertChainInvalid
Peer’s cross-certificate chain is invalid.
iOS, macOS, tvOS, visionOS, watchOS Security SecBase.h
-1278
errState
Invalid error state.
macOS CarbonCore MacErrors.h
-10780
errTaskNotFound
Task not found.
macOS CarbonCore MacErrors.h
-1811
errTopOfBody
Top of body error.
macOS CarbonCore MacErrors.h
-1810
errTopOfDocument
Reached the top of the document unexpectedly.
macOS CarbonCore MacErrors.h
-964
errTreeIsLocked
AVL tree structure is locked and cannot be modified.
macOS CarbonCore AVLTree.h
-5240
errUnknownAttributeTag
Unknown attribute tag encountered.
macOS CarbonCore MacErrors.h
-30584
errUnknownControl
Control is unknown or unrecognized by the system.
macOS CarbonCore MacErrors.h
-5251
errUnknownElement
The specified element is unknown or invalid.
macOS CarbonCore MacErrors.h
-5605
errUnrecognizedWindowClass
Unrecognized window class in CarbonCore.
macOS CarbonCore MacErrors.h
-5601
errUnsupportedWindowAttributesForClass
Window attributes not supported for class
macOS CarbonCore MacErrors.h
-5607
errUserWantsToDragWindow
User wants to drag the window, interrupting the operation.
macOS CarbonCore MacErrors.h
-5611
errWindowDoesNotFitOnscreen
Window cannot fit entirely on screen.
macOS CarbonCore MacErrors.h
-5602
errWindowDoesNotHaveProxy
Window does not have a proxy icon.
macOS CarbonCore MacErrors.h
-30583
errWindowDoesntSupportFocus
Window does not support focusable controls.
macOS CarbonCore MacErrors.h
-5610
errWindowNotFound
Window not found.
macOS CarbonCore MacErrors.h
-5604
errWindowPropertyNotFound
Window property not found
macOS CarbonCore MacErrors.h
-30593
errWindowRegionCodeInvalid
Window region code is invalid or unrecognized.
macOS CarbonCore MacErrors.h
-5608
errWindowsAlreadyInitialized
Windows have already been initialized.
macOS CarbonCore MacErrors.h
-65793
errWSInternalError
Internal error occurred within the WebServices subsystem.
macOS OSServices WSTypes.h
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