Hi endecotp, I'm the author of TPInAppReceipt. Unfortunately, I don't have access to the new arm macs yet and haven't tried to run ios app on macOS, but I'm 99.9% sure that it will work, like it works for Catalyst apps. I will be more than happy if you have a chance to try it out and prove my correctness. Thank you, P

Hi endecotp, I truly appreciate your efforts in trying to figure out what should we do in this case and kudos for reporting it to developer technical support. Personally, I thought we can do the same what we did for Catalyst apps, basically, switch to macOS implementation which is close to what you've described: #elseif targetEnvironment(macCatalyst) || os(macOS)     var masterPort = mach_port_t()     var kernResult: kern_return_t = IOMasterPort(mach_port_t(MACH_PORT_NULL), &masterPort)     if (kernResult != KERN_SUCCESS)     {         assertionFailure("Failed to initialize master port")     }     let matchingDict = IOBSDNameMatching(masterPort, 0, "en0")     if (matchingDict == nil)     { assertionFailure("Failed to retrieve guid")     }          var iterator = io_iterator_t()     kernResult = IOServiceGetMatchingServices(masterPort, matchingDict, &iterator)     if (kernResult != KERN_SUCCESS)     {         assertionFailure("Failed to retrieve guid")     }     var guidData: Data?     var service = IOIteratorNext(iterator)     var parentService = io_object_t()     defer     {         IOObjectRelease(iterator)     }     while(service != 0)     {         kernResult = IORegistryEntryGetParentEntry(service, kIOServicePlane, &parentService)         if (kernResult == KERN_SUCCESS)         {             guidData = IORegistryEntryCreateCFProperty(parentService, "IOMACAddress" as CFString, nil, 0).takeRetainedValue() as? Data             IOObjectRelease(parentService)         }         IOObjectRelease(service)         if  guidData != nil {             break         }else{             service = IOIteratorNext(iterator)         }     }     if guidData == nil     {         assertionFailure("Failed to retrieve guid")     }     return guidData!     #endif Anyway, I've created a ticket (https://github.com/tikhop/TPInAppReceipt/issues/73) — let's see maybe someone else knows how to deal with that. Let me know if you have any questions or I can help somehow here. You can send me email if so (tikhop at gmail com) Thank you.

Same here!