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
12
ENOMEM
Insufficient memory available for the requested operation.
iOS, macOS, tvOS Kernel errno.h
91
ENOMSG
No message available on the specified queue.
iOS, macOS, tvOS Kernel errno.h
103
ENOPOLICY
No policy is set for the requested operation.
iOS, macOS, tvOS Kernel errno.h
42
ENOPROTOOPT
Protocol option not supported or unavailable.
iOS, macOS, tvOS Kernel errno.h
28
ENOSPC
No space left on device.
iOS, macOS, tvOS Kernel errno.h
98
ENOSR
Out of stream resources; operation failed.
iOS, macOS, tvOS Kernel errno.h
99
ENOSTR
Device is not a stream; operation unsupported.
iOS, macOS, tvOS Kernel errno.h
78
ENOSYS
Function or operation not implemented in the current system.
iOS, macOS, tvOS Kernel errno.h
15
ENOTBLK
Device is not a block device; operation not supported.
iOS, macOS, tvOS Kernel errno.h
57
ENOTCONN
Socket is not connected; operation requires an active connection.
iOS, macOS, tvOS Kernel errno.h
20
ENOTDIR
Operation requires a directory, but a non-directory was specified.
iOS, macOS, tvOS Kernel errno.h
66
ENOTEMPTY
Directory is not empty; operation cannot proceed.
iOS, macOS, tvOS Kernel errno.h
104
ENOTRECOVERABLE
State of the resource is not recoverable.
iOS, macOS, tvOS Kernel errno.h
38
ENOTSOCK
Operation attempted on a non-socket resource.
iOS, macOS, tvOS Kernel errno.h
45
ENOTSUP
Operation not supported on the current system.
iOS, macOS, tvOS Kernel errno.h
25
ENOTTY
Inappropriate I/O control operation for the device.
iOS, macOS, tvOS Kernel errno.h
-5501
envBadVers
Environment version is incompatible
macOS CarbonCore MacErrors.h
-5500
envNotPresent
Required environment not present.
macOS CarbonCore MacErrors.h
-5502
envVersTooBig
Environment version is too big
macOS CarbonCore MacErrors.h
6
ENXIO
No such device or address.
iOS, macOS, tvOS Kernel errno.h
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