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 |
|---|---|---|---|---|
| 121 |
kCFSOCKS5ErrorBadResponseAddr
SOCKS5 returned a bad or malformed address
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| 120 |
kCFSOCKS5ErrorBadState
SOCKS5 proxy is in an invalid state.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| 124 |
kCFSOCKS5ErrorNoAcceptableMethod
No acceptable SOCKS5 authentication method found.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| 123 |
kCFSOCKS5ErrorUnsupportedNegotiationMethod
CFSocket SOCKS5 unsupported negotiation method.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| 100 |
kCFSOCKSErrorUnknownClientVersion
CFNetwork: socket error unknown client version.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| 101 |
kCFSOCKSErrorUnsupportedServerVersion
SOCKS server does not support the requested version.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| -1 |
kCFStreamErrorDomainCustom
Custom error in CFStream.
|
iOS, macOS, tvOS, visionOS, watchOS | CoreFoundation | CFStream.h |
| 1 |
kCFStreamErrorDomainPOSIX
POSIX domain error related to CFStream.
|
iOS, macOS, tvOS, visionOS, watchOS | CoreFoundation | CFStream.h |
| -1002 |
kCFStreamErrorHTTPAuthenticationBadPassword
HTTP authentication failed due to a bad password.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFHTTPAuthentication.h |
| -1001 |
kCFStreamErrorHTTPAuthenticationBadUserName
Invalid or unrecognized username in HTTP authentication
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFHTTPAuthentication.h |
| -1000 |
kCFStreamErrorHTTPAuthenticationTypeUnsupported
HTTP authentication type is unsupported
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFHTTPAuthentication.h |
| -3 |
kCFStreamErrorHTTPBadURL
HTTP bad URL in stream.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFHTTPStream.h |
| -1 |
kCFStreamErrorHTTPParseFailure
HTTP parse failure in CFNetwork.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFHTTPStream.h |
| -2 |
kCFStreamErrorHTTPRedirectionLoop
Repeated HTTP redirects with no resolution.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFHTTPStream.h |
| 311 |
kCFStreamErrorHTTPSProxyFailureUnexpectedResponseToCONNECTMethod
CFStream HTTPS proxy failure due to unexpected response to CONNECT method.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFNetworkErrors.h |
| 93 |
kCFStreamErrorSOCKS4IdConflict
SOCKS4 request ID conflict encountered.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFSocketStream.h |
| 92 |
kCFStreamErrorSOCKS4IdentdFailed
CFStream SOCKS4 identd failed.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFSocketStream.h |
| 91 |
kCFStreamErrorSOCKS4RequestFailed
CFNetwork: SOCKS4 request failed.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFSocketStream.h |
| 2 |
kCFStreamErrorSOCKS4SubDomainResponse
SOCKS4 subdomain response error.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFSocketStream.h |
| 1 |
kCFStreamErrorSOCKS5BadResponseAddr
CFNetwork: SOCKS5 bad response address.
|
iOS, macOS, tvOS, visionOS, watchOS | CFNetwork | CFSocketStream.h |