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 |
|---|---|---|---|---|
| 92 |
EILSEQ
Illegal byte sequence encountered during the operation.
|
iOS, macOS, tvOS | Kernel | errno.h |
| 36 |
EINPROGRESS
Operation already in progress; cannot start a duplicate.
|
iOS, macOS, tvOS | Kernel | errno.h |
| 4 |
EINTR
Operation interrupted; cannot proceed.
|
iOS, macOS, tvOS | Kernel | errno.h |
| 22 |
EINVAL
Invalid argument provided for the operation.
|
iOS, macOS, tvOS | Kernel | errno.h |
| 5 |
EIO
Input/output error occurred; operation failed.
|
iOS, macOS, tvOS | Kernel | errno.h |
| -14331 |
eIPCReceiveError
DirectoryService IPC receive error.
|
macOS | DirectoryService | DirServicesTypes.h |
| -14330 |
eIPCSendError
IPC send operation error.
|
macOS | DirectoryService | DirServicesTypes.h |
| 56 |
EISCONN
Socket is already connected; duplicate connections not allowed.
|
iOS, macOS, tvOS | Kernel | errno.h |
| 21 |
EISDIR
Operation not allowed on a directory.
|
iOS, macOS, tvOS | Kernel | errno.h |
| 8 |
EKErrorAlarmGreaterThanRecurrence
Alarm interval exceeds the event’s recurrence.
|
iOS, macOS, visionOS, watchOS | EventKit | EKError.h |
| 21 |
EKErrorAlarmProximityNotSupported
Event Kit alarm proximity not supported.
|
iOS, macOS, visionOS, watchOS | EventKit | EKError.h |
| 22 |
EKErrorCalendarDoesNotAllowEvents
Calendar does not allow adding events.
|
iOS, macOS, visionOS, watchOS | EventKit | EKError.h |
| 23 |
EKErrorCalendarDoesNotAllowReminders
EventKit: calendar does not allow reminders.
|
iOS, macOS, visionOS, watchOS | EventKit | EKError.h |
| 14 |
EKErrorCalendarHasNoSource
Calendar has no source in EventKit.
|
iOS, macOS, visionOS, watchOS | EventKit | EKError.h |
| 16 |
EKErrorCalendarIsImmutable
Calendar cannot be modified because it is immutable.
|
iOS, macOS, visionOS, watchOS | EventKit | EKError.h |
| 6 |
EKErrorCalendarReadOnly
Calendar is read-only in EventKit.
|
iOS, macOS, visionOS, watchOS | EventKit | EKError.h |
| 15 |
EKErrorCalendarSourceCannotBeModified
EventKit: calendar source cannot be modified.
|
iOS, macOS, visionOS, watchOS | EventKit | EKError.h |
| 4 |
EKErrorDatesInverted
Start date is after end date in EventKit.
|
iOS, macOS, visionOS, watchOS | EventKit | EKError.h |
| 7 |
EKErrorDurationGreaterThanRecurrence
Event duration exceeds recurrence interval
|
iOS, macOS, visionOS, watchOS | EventKit | EKError.h |
| 0 |
EKErrorEventNotMutable
Event cannot be modified.
|
iOS, macOS, visionOS, watchOS | EventKit | EKError.h |