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 |
|---|---|---|---|---|
| 2 |
kCFStreamErrorSOCKS5BadState
Invalid SOCKS5 state in stream.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFSocketStream.h |
| 4 |
kCFStreamErrorSOCKS5SubDomainMethod
SOCKS5 subdomain method error in stream.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFSocketStream.h |
| 5 |
kCFStreamErrorSOCKS5SubDomainResponse
Error in the SOCKS5 sub-negotiation response.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFSocketStream.h |
| 3 |
kCFStreamErrorSOCKS5SubDomainUserPass
User/pass sub-negotiation error in SOCKS5.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFSocketStream.h |
| 0 |
kCFStreamErrorSOCKSSubDomainNone
No SOCKS subdomain error in CFNetwork.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFSocketStream.h |
| 1 |
kCFStreamErrorSOCKSSubDomainVersionCode
SOCKS subdomain version code error
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFSocketStream.h |
| 3 |
kCFStreamErrorSOCKSUnknownClientVersion
CFStream SOCKS error: unknown client version.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFSocketStream.h |
| 8 |
kCFStreamEventErrorOccurred
An error occurred on the CFStream.
|
iOS, macOS, tvOS, visionOS, watchOS | CoreFoundation | CFStream.h |
| 3 |
kCFURLEnumeratorError
Error enumerating URLs.
|
iOS, macOS, tvOS, visionOS, watchOS | CoreFoundation | CFURLEnumerator.h |
| -1022 |
kCFURLErrorAppTransportSecurityRequiresSecureConnection
App Transport Security requires secure connection.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| -996 |
kCFURLErrorBackgroundSessionInUseByAnotherProcess
Another process is using the background session.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| -997 |
kCFURLErrorBackgroundSessionWasDisconnected
Background session disconnected unexpectedly.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| -1011 |
kCFURLErrorBadServerResponse
Bad server response in CFNetwork.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| -1000 |
kCFURLErrorBadURL
Bad URL format in CFNetwork
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| -1019 |
kCFURLErrorCallIsActive
URL error: call is active.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| -999 |
kCFURLErrorCancelled
Request was canceled
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| -3002 |
kCFURLErrorCannotCloseFile
CFNetwork error indicating failure to close file.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| -1004 |
kCFURLErrorCannotConnectToHost
Cannot connect to the specified host.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| -3000 |
kCFURLErrorCannotCreateFile
File creation failed.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| -1016 |
kCFURLErrorCannotDecodeContentData
CFNetwork failed to decode the content data from the response.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |