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 |
|---|---|---|---|---|
| 303 |
kCFErrorHTTPParseFailure
Failed to parse HTTP response or request.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| 306 |
kCFErrorHTTPProxyConnectionFailure
HTTP proxy connection failed in CFNetwork.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| 304 |
kCFErrorHTTPRedirectionLoopDetected
HTTP redirection loop. The request repeatedly redirected.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| 310 |
kCFErrorHTTPSProxyConnectionFailure
HTTPS proxy connection failed.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| 309 |
kCFErrorPACFileAuth
Authentication error for the PAC file.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| 308 |
kCFErrorPACFileError
CFNetwork: PAC file error.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| 200 |
kCFFTPErrorUnexpectedStatusCode
Unexpected or unrecognized status code from the FTP server.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| 1 |
kCFHostErrorHostNotFound
CFNetwork: host not found.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| 2 |
kCFHostErrorUnknown
Unknown host error in CFNetwork.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| -5 |
kCFMessagePortBecameInvalidError
Message port became invalid while in use.
|
iOS, macOS, tvOS, visionOS, watchOS | CoreFoundation | CFMessagePort.h |
| -4 |
kCFMessagePortTransportError
Message port transport error occurred.
|
iOS, macOS, tvOS, visionOS, watchOS | CoreFoundation | CFMessagePort.h |
| -66560 |
kCFNetDiagnosticErr
CFNetwork diagnostic error.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetDiagnostics.h |
| 0 |
kCFNetDiagnosticNoErr
No network diagnostic error in CFNetwork.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetDiagnostics.h |
| -72004 |
kCFNetServiceErrorBadArgument
An invalid or incorrect argument was provided for the network service operation.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| -72005 |
kCFNetServiceErrorCancel
The network service operation was canceled.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| -72001 |
kCFNetServiceErrorCollision
A name conflict occurred during a network service registration or resolution.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| -73000 |
kCFNetServiceErrorDNSServiceFailure
A DNS service failure occurred while resolving or registering a network service.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| -72003 |
kCFNetServiceErrorInProgress
A network service operation is already in progress and cannot be initiated again.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| -72006 |
kCFNetServiceErrorInvalid
An invalid network service parameter or state was encountered.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| -72002 |
kCFNetServiceErrorNotFound
The requested network service was not found.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |