What does macOS kernel return 0 (kOSReturnSuccess) mean? Status / error code: Category: Constant name: Source: Operating System: Description: Operation successful. Could be also: ConstantTypeOS ERROR_SUCCESSWin32 errorWindows STATUS_SUCCESSNTSTATUSWindows STATUS_WAIT_0NTSTATUSWindows KERN_SUCCESSKern returnMac MACH_MSG_SUCCESSKern returnMac ippStsNoErrIntel Ipp StatusAny S_OKHRESULTWindows hrNoneHRESULTWindows Looking for a different code? Search another status or error code.