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 |
|---|---|---|---|---|
| 1 |
MCErrorNotConnected
Multipeer Connectivity is not connected.
|
iOS, macOS, tvOS, visionOS, watchOS | MultipeerConnectivity | MCError.h |
| 4 |
MCErrorTimedOut
MultipeerConnectivity session timed out.
|
iOS, macOS, tvOS, visionOS, watchOS | MultipeerConnectivity | MCError.h |
| 6 |
MCErrorUnavailable
MultipeerConnectivity service unavailable.
|
iOS, macOS, tvOS, visionOS, watchOS | MultipeerConnectivity | MCError.h |
| 0 |
MCErrorUnknown
Unknown error in MultipeerConnectivity.
|
iOS, macOS, tvOS, visionOS, watchOS | MultipeerConnectivity | MCError.h |
| 3 |
MCErrorUnsupported
Multipeer Connectivity operation unsupported.
|
iOS, macOS, tvOS, visionOS, watchOS | MultipeerConnectivity | MCError.h |
| 2 |
MEComposeSessionErrorCodeInvalidBody
Invalid email body in MailKit.
|
macOS | MailKit | MEComposeSession.h |
| 1 |
MEComposeSessionErrorCodeInvalidHeaders
MailKit compose session has invalid headers.
|
macOS | MailKit | MEComposeSession.h |
| 0 |
MEComposeSessionErrorCodeInvalidRecipients
Invalid recipients in MailKit.
|
macOS | MailKit | MEComposeSession.h |
| -2018 |
mediaTypesDontMatch
Media types do not match
|
macOS | CarbonCore | MacErrors.h |
| -110 |
memAdrErr
Memory address error or invalid pointer reference.
|
macOS | CarbonCore | MacErrors.h |
| -113 |
memAZErr
Memory allocation zone error
|
macOS | CarbonCore | MacErrors.h |
| -115 |
memBCErr
Memory buffer copy error.
|
macOS | CarbonCore | MacErrors.h |
| 1 |
MEMessageSecurityDecodingError
Unable to decode a secure message properly.
|
macOS | MailKit | MEMessageSecurityHandler.h |
| 0 |
MEMessageSecurityEncodingError
Message security encoding error in MailKit.
|
macOS | MailKit | MEMessageSecurityHandler.h |
| -601 |
memFragErr
Memory fragmentation error in CarbonCore.
|
macOS | CarbonCore | MacErrors.h |
| -108 |
memFullErr
System memory is full or insufficient.
|
macOS | CarbonCore | MacErrors.h |
| -117 |
memLockedErr
Memory is locked error.
|
macOS | CarbonCore | MacErrors.h |
| -114 |
memPCErr
Program counter error in memory
|
macOS | CarbonCore | MacErrors.h |
| -112 |
memPurErr
Memory purge error.
|
macOS | CarbonCore | MacErrors.h |
| -99 |
memROZErr
Memory read or zone operation error occurred.
|
macOS | CarbonCore | MacErrors.h |