We have 2 process in our macOS application Daemon process written in golang Swift application Currently, the communication between both the process are done with Unix domain socket. However, we are seeing significant amount of delay when large amount of data communication. We are looking for some faster communication. Probably XPC is the answer. But not sure how to use XPC between two process which are written in different language. Any sample code would be great help.

We see warnings like this logged by our processes using XPC: (Foundation) [com.apple.runtime-issues:Foundation] *** -[NSXPCDecoder validateAllowedClass:forKey:]: NSSecureCoding allowed classes list contains [NSObject class], which bypasses security by allowing any Objective-C class to be implicitly decoded. Consider reducing the scope of allowed classes during decoding by listing only the classes you expect to decode, or a more specific base class than NSObject. This will become an error in the future. Allowed class list: {( "'NSObject' (0x7ff844ee0d88) [/usr/lib]" )} As far as we can see, there is no explicit NSObject in allowed classes for any XPC connection. Where does this list and NSObject come from?

Hello! I'm new here, and probably this will sound weird but, I'm trying to write a C++ program using an XPC service to attempt to communicate with a macOS app I'm developing in Swift. At the macOS app side I think I'm successfully registering and connecting to the service, as launchd reports the following in its log: 2023-05-31 17:20:21.898621 (pid/15637 [On Air]) <Notice>: Service stub created for com.ruieduardolopes.onaird-join At the C++ side I'm trying to get a simple example working, as follows, but currently without any success... #include <xpc/xpc.h> int main(int argc, const char* argv[]) { xpc_connection_t conn = xpc_connection_create_mach_service("com.ruieduardolopes.onaird.join", NULL, 0); xpc_object_t message = xpc_dictionary_create(NULL, NULL, 0); xpc_connection_set_event_handler(conn, ^(xpc_object_t object) {}); xpc_connection_resume(conn); xpc_dictionary_set_string(message, "SS", "AAAAAA\n"); xpc_connection_send_message_with_reply(conn, message, dispatch_get_main_queue(), ^(xpc_object_t object) {}); return (EXIT_SUCCESS); } I get the following error in the logs: 2023-05-31 17:27:45.636894 (system/com.ruieduardolopes.onaird) <Notice>: internal event: WILL_SPAWN, code = 0 2023-05-31 17:27:45.636903 (system/com.ruieduardolopes.onaird) <Notice>: service state: spawn scheduled 2023-05-31 17:27:45.636904 (system/com.ruieduardolopes.onaird) <Notice>: service state: spawning 2023-05-31 17:27:45.637017 (system/com.ruieduardolopes.onaird) <Notice>: launching: ipc (mach) 2023-05-31 17:27:45.637256 (system/com.ruieduardolopes.onaird [15908]) <Notice>: xpcproxy spawned with pid 15908 2023-05-31 17:27:45.637264 (system/com.ruieduardolopes.onaird [15908]) <Notice>: internal event: SPAWNED, code = 0 2023-05-31 17:27:45.637265 (system/com.ruieduardolopes.onaird [15908]) <Notice>: service state: xpcproxy 2023-05-31 17:27:45.637269 (system/com.ruieduardolopes.onaird [15908]) <Notice>: internal event: SOURCE_ATTACH, code = 0 2023-05-31 17:27:45.648927 (system/com.ruieduardolopes.onaird [15908]) <Notice>: service state: running 2023-05-31 17:27:45.648940 (system/com.ruieduardolopes.onaird [15908]) <Notice>: internal event: INIT, code = 0 2023-05-31 17:27:45.648948 (system/com.ruieduardolopes.onaird [15908]) <Notice>: Successfully spawned onaird-join[15908] because ipc (mach) 2023-05-31 17:27:45.687251 (system/com.ruieduardolopes.onaird [15908]) <Notice>: exited due to SIGTRAP | sent by exc handler[15908] 2023-05-31 17:27:45.687261 (system/com.ruieduardolopes.onaird [15908]) <Notice>: service has crashed 1 times in a row 2023-05-31 17:27:45.687263 (system/com.ruieduardolopes.onaird [15908]) <Notice>: service state: exited 2023-05-31 17:27:45.687267 (system/com.ruieduardolopes.onaird [15908]) <Notice>: internal event: EXITED, code = 0 2023-05-31 17:27:45.687269 (system) <Notice>: service inactive: com.ruieduardolopes.onaird 2023-05-31 17:27:45.687281 (system/com.ruieduardolopes.onaird [15908]) <Notice>: service state: not running 2023-05-31 17:27:45.687290 (system/com.ruieduardolopes.onaird) <Notice>: Service only ran for 0 seconds. Pushing respawn out by 10 seconds. 2023-05-31 17:27:45.687339 (system/com.ruieduardolopes.onaird) <Notice>: internal event: WILL_SPAWN, code = 0 2023-05-31 17:27:45.687343 (system/com.ruieduardolopes.onaird) <Notice>: service state: spawn scheduled 2023-05-31 17:27:45.687344 (system/com.ruieduardolopes.onaird) <Notice>: service throttled by 10 seconds The plist file I'm currently loading to /Library/LaunchDaemons is as follows: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>Label</key> <string>com.ruieduardolopes.onaird</string> <key>Program</key> <string>PATH_TO_ONAIR_JOIN_XPC_SERVICE_BINARY</string> <key>BuildMachineOSBuild</key> <string>22C65</string> <key>CFBundleDevelopmentRegion</key> <string>en</string> <key>CFBundleDisplayName</key> <string>onaird-join</string> <key>CFBundleExecutable</key> <string>onaird-join</string> <key>CFBundleIdentifier</key> <string>com.ruieduardolopes.onaird-join</string> <key>CFBundleInfoDictionaryVersion</key> <string>6.0</string> <key>CFBundleName</key> <string>onaird-join</string> <key>CFBundlePackageType</key> <string>XPC!</string> <key>CFBundleShortVersionString</key> <string>1.0</string> <key>CFBundleSupportedPlatforms</key> <array> <string>MacOSX</string> </array> <key>CFBundleVersion</key> <string>1</string> <key>DTCompiler</key> <string>com.apple.compilers.llvm.clang.1_0</string> <key>DTPlatformBuild</key> <string></string> <key>DTPlatformName</key> <string>macosx</string> <key>DTPlatformVersion</key> <string>13.3</string> <key>DTSDKBuild</key> <string>22E245</string> <key>DTSDKName</key> <string>macosx13.3</string> <key>DTXcode</key> <string>1430</string> <key>DTXcodeBuild</key> <string>14E222b</string> <key>LSMinimumSystemVersion</key> <string>13.1</string> <key>MachServices</key> <dict> <key>com.ruieduardolopes.onaird.join</key> <true/> </dict> <key>XPCService</key> <dict> <key>ServiceType</key> <string>Application</string> </dict> </dict> </plist> Can anybody help me? Thanks in advance, Rui

I am working as an iOS Developer since 2 years. I am getting log on console like: [MADService] Client XPC connection invalidated sometimes. I am unable to get when and for what reason i am getting this. need some help. Thank you