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 |
|---|---|---|---|---|
| -1010 |
NSURLErrorRedirectToNonExistentLocation
Redirection to a non-existent resource.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1021 |
NSURLErrorRequestBodyStreamExhausted
Request body stream has no more data.
|
macOS | Foundation | NSURLError.h |
| -1008 |
NSURLErrorResourceUnavailable
URL resource is unavailable
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1200 |
NSURLErrorSecureConnectionFailed
Secure connection failed in URL loading.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1201 |
NSURLErrorServerCertificateHasBadDate
Server certificate has bad date.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1203 |
NSURLErrorServerCertificateHasUnknownRoot
Server certificate has unknown root in URL.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1204 |
NSURLErrorServerCertificateNotYetValid
Server certificate not yet valid.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1202 |
NSURLErrorServerCertificateUntrusted
The server’s SSL certificate is not trusted.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1001 |
NSURLErrorTimedOut
Network request timed out
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1 |
NSURLErrorUnknown
Unknown URL error in Foundation.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1002 |
NSURLErrorUnsupportedURL
Unsupported URL format.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1013 |
NSURLErrorUserAuthenticationRequired
URL loading requires user authentication.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1012 |
NSURLErrorUserCancelledAuthentication
URL error: user cancelled authentication.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1014 |
NSURLErrorZeroByteResource
URL error: zero-byte resource.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| 1011 |
NSURLSessionWebSocketCloseCodeInternalServerError
NSURLSession: WebSocket internal server error.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLSession.h |
| 1002 |
NSURLSessionWebSocketCloseCodeProtocolError
WebSocket protocol error in NSURLSession.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLSession.h |
| 4609 |
NSUserActivityConnectionUnavailableError
User activity connection is unavailable.
|
macOS | Foundation | FoundationErrors.h |
| 4863 |
NSUserActivityErrorMaximum
User activity error reached maximum limit.
|
macOS | Foundation | FoundationErrors.h |
| 4608 |
NSUserActivityErrorMinimum
Minimum value for NSUserActivity-related errors.
|
macOS | Foundation | FoundationErrors.h |
| 4608 |
NSUserActivityHandoffFailedError
UserActivity: handoff failed.
|
macOS | Foundation | FoundationErrors.h |