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
Page 52 of 320 6398 results