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 |
|---|---|---|---|---|
| 3758097101, -536870195 (int32) (0xE00002CD) |
kIOReturnNotOpen
Device or resource is not open for the requested operation.
|
macOS | Kernel | IOReturn.h |
| 3758097122, -536870174 (int32) (0xE00002E2) |
kIOReturnNotPermitted
Operation not permitted by the system or user settings.
|
macOS | Kernel | IOReturn.h |
| 3758097089, -536870207 (int32) (0xE00002C1) |
kIOReturnNotPrivileged
Operation requires elevated privileges; insufficient access rights.
|
macOS | Kernel | IOReturn.h |
| 3758097102, -536870194 (int32) (0xE00002CE) |
kIOReturnNotReadable
Resource is not readable; operation failed.
|
macOS | Kernel | IOReturn.h |
| 3758097112, -536870184 (int32) (0xE00002D8) |
kIOReturnNotReady
Device or resource is not ready for the requested operation.
|
macOS | Kernel | IOReturn.h |
| 3758097133, -536870163 (int32) (0xE00002ED) |
kIOReturnNotResponding
Device or resource is not responding to requests.
|
macOS | Kernel | IOReturn.h |
| 3758097103, -536870193 (int32) (0xE00002CF) |
kIOReturnNotWritable
The specified resource is not writable in the I/O Kit subsystem.
|
macOS | Kernel | IOReturn.h |
| 3758097111, -536870185 (int32) (0xE00002D7) |
kIOReturnOffline
Resource or device is offline; operation cannot proceed.
|
macOS | Kernel | IOReturn.h |
| 3758097128, -536870168 (int32) (0xE00002E8) |
kIOReturnOverrun
Operation overrun occurred; data exceeds available space.
|
macOS | Kernel | IOReturn.h |
| 3758097117, -536870179 (int32) (0xE00002DD) |
kIOReturnPortExists
Port already exists; operation cannot proceed.
|
macOS | Kernel | IOReturn.h |
| 3758097107, -536870189 (int32) (0xE00002D3) |
kIOReturnRLDError
Runtime link editor error; typically due to Mach-O relocation or loading issues.
|
macOS | Kernel | IOReturn.h |
| 3758097106, -536870190 (int32) (0xE00002D2) |
kIOReturnStillOpen
Operation failed because the resource is still open.
|
macOS | Kernel | IOReturn.h |
| 0 (0x0) |
kIOReturnSuccess
Operation completed successfully without errors.
|
macOS | Kernel | IOReturn.h |
| 3758097110, -536870186 (int32) (0xE00002D6) |
kIOReturnTimeout
Operation timed out; resource or device did not respond.
|
macOS | Kernel | IOReturn.h |
| 3758097127, -536870169 (int32) (0xE00002E7) |
kIOReturnUnderrun
Operation underrun occurred; insufficient data available.
|
macOS | Kernel | IOReturn.h |
| 3758097125, -536870171 (int32) (0xE00002E5) |
kIOReturnUnformattedMedia
Media is unformatted; operation cannot proceed.
|
macOS | Kernel | IOReturn.h |
| 3758097095, -536870201 (int32) (0xE00002C7) |
kIOReturnUnsupported
Operation not supported.
|
macOS | Kernel | IOReturn.h |
| 3758097126, -536870170 (int32) (0xE00002E6) |
kIOReturnUnsupportedMode
Operation failed due to unsupported mode.
|
macOS | Kernel | IOReturn.h |
| 3758097096, -536870200 (int32) (0xE00002C8) |
kIOReturnVMError
Virtual memory error detected during operation.
|
macOS | Kernel | IOReturn.h |
| 64 (0x00000040) |
kIORPCMessageError
Invalid or malformed IOKit RPC message.
|
macOS | IOKit | IORPC.h |