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 |
|---|---|---|---|---|
| -1017 |
NSURLErrorCannotParseResponse
Cannot parse response.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -3004 |
NSURLErrorCannotRemoveFile
Cannot remove specified file.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -3003 |
NSURLErrorCannotWriteToFile
Cannot write to file.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1205 |
NSURLErrorClientCertificateRejected
Client certificate was rejected by the server.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1206 |
NSURLErrorClientCertificateRequired
URL error: client certificate required.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1103 |
NSURLErrorDataLengthExceedsMaximum
URL error: data length exceeds maximum.
|
macOS | Foundation | NSURLError.h |
| -1020 |
NSURLErrorDataNotAllowed
Data transfer not allowed by URL error.
|
macOS | Foundation | NSURLError.h |
| -1006 |
NSURLErrorDNSLookupFailed
DNS lookup failed in URL operation.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -3006 |
NSURLErrorDownloadDecodingFailedMidStream
Download data decoding failed partway through.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -3007 |
NSURLErrorDownloadDecodingFailedToComplete
Download decoding failed to complete.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1100 |
NSURLErrorFileDoesNotExist
File does not exist in URL request.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1101 |
NSURLErrorFileIsDirectory
Requested file is actually a directory
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1007 |
NSURLErrorHTTPTooManyRedirects
HTTP too many redirects error.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1018 |
NSURLErrorInternationalRoamingOff
International data roaming is turned off.
|
macOS | Foundation | NSURLError.h |
| -1005 |
NSURLErrorNetworkConnectionLost
Network connection was lost
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| 0 |
NSURLErrorNetworkUnavailableReasonCellular
Network unavailable due to cellular in Foundation.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| 2 |
NSURLErrorNetworkUnavailableReasonConstrained
Network unavailable due to constraints in Foundation.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| 1 |
NSURLErrorNetworkUnavailableReasonExpensive
Network unavailable due to expensive connection.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1102 |
NSURLErrorNoPermissionsToReadFile
Lacking permissions to read the file
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |
| -1009 |
NSURLErrorNotConnectedToInternet
Not connected to internet in URL request.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSURLError.h |