macOS error codes

25 codes — tap one for its meaning, causes, and fix steps.

• -10004Application not found (Launch Services) — no registered handler exists for the bundle identifier or URL scheme.
• -108Not enough memory (memFullErr) — the system could not allocate the requested heap space.
• -10810Cannot open application — the Launch Services framework failed to open the requested app.
• -120Directory not found (dirNFErr) — the specified directory path does not exist.
• -128User cancelled operation (userCanceledErr) — the user dismissed a dialog or pressed Command+Period to stop the operation.
• -1708Apple Event not handled (errAEEventNotHandled) — the target app has no handler registered for the received Apple Event.
• -1712Apple Event timeout (errAETimeout) — an inter-process Apple Event did not receive a reply within the allowed time.
• -192Resource not found (resNotFound) — the Resource Manager could not locate a requested resource handle.
• -25291Screen is locked — a Keychain or security operation requires an unlocked screen.
• -25307Security framework error — a Keychain or certificate trust operation returned an unexpected error.
• -34Disk full (dskFulErr) — the destination volume has no remaining free space.
• -34018Keychain entitlement missing (errSecMissingEntitlement) — an app tried to access a Keychain item but lacks the required entitlement.
• -35Volume not found (nsvErr) — the operating system could not locate the specified volume.
• -36I/O error (ioErr) — a low-level read or write failed on a disk or volume.
• -43File not found (fnfErr) — the system could not locate the file or directory at the specified path.
• -47File busy (fBsyErr) — the file is held open by another process and cannot be deleted or moved.
• -50Parameter error (paramErr) — an invalid or out-of-range value was passed to a system call.
• -54File permission error (permErr) — the process tried to open a file in a mode its permissions do not allow.
• -600Process not found (procNotFound) — Launch Services could not find or start the target process.
• -67062Code signature verification failed — the cryptographic signature on an app or library could not be validated.
• -69716APFS snapshot error — an APFS snapshot could not be created or rolled back.
• -69845Disk Utility First Aid failure — the APFS file system could not be verified or repaired.
• -69888Could not unmount disk — Disk Utility cannot unmount the volume needed for repair.
• -8003Finder operation failed — Finder encountered an unrecognised resource-fork or metadata write failure.
• 1009App Store item unavailable in your region — the requested item cannot be purchased or downloaded in the current storefront.