Apple Error Codes Database
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 |
|---|---|---|---|---|
| -1022 |
NSURLErrorAppTransportSecurityRequiresSecureConnection
ATS requires a secure (HTTPS) connection
|
macOS | Foundation | NSURLError.h |
| -996 |
NSURLErrorBackgroundSessionInUseByAnotherProcess
Background URL session is in use by another process.
|
macOS | Foundation | NSURLError.h |
| -995 |
NSURLErrorBackgroundSessionRequiresSharedContainer
Background session requires shared container in NSURL.
|
macOS | Foundation | NSURLError.h |
| -997 |
NSURLErrorBackgroundSessionWasDisconnected
Background session was unexpectedly disconnected.
|
macOS | Foundation | NSURLError.h |
| -1011 |
NSURLErrorBadServerResponse
Bad response received from server in URL operation.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1000 |
NSURLErrorBadURL
The URL is malformed or invalid.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1019 |
NSURLErrorCallIsActive
Network request failed because a call is active
|
macOS | Foundation | NSURLError.h |
| -999 |
NSURLErrorCancelled
URL request was cancelled.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| 1 |
NSURLErrorCancelledReasonBackgroundUpdatesDisabled
Request canceled because background updates are disabled.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| 2 |
NSURLErrorCancelledReasonInsufficientSystemResources
Request cancelled due to insufficient system resources.
|
macOS | Foundation | NSURLError.h |
| 0 |
NSURLErrorCancelledReasonUserForceQuitApplication
Request cancelled due to user force quit in Foundation.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -3002 |
NSURLErrorCannotCloseFile
Failed to close the file URL resource.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1004 |
NSURLErrorCannotConnectToHost
Cannot connect to the requested host.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -3000 |
NSURLErrorCannotCreateFile
Unable to create the specified file.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1016 |
NSURLErrorCannotDecodeContentData
Cannot decode the content data.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1015 |
NSURLErrorCannotDecodeRawData
Raw data from the server cannot be decoded.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1003 |
NSURLErrorCannotFindHost
Cannot find host in URL operation.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -2000 |
NSURLErrorCannotLoadFromNetwork
URL error: cannot load from network.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -3005 |
NSURLErrorCannotMoveFile
Cannot move file in Foundation.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -3001 |
NSURLErrorCannotOpenFile
Cannot open the specified file URL
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |