Hi Team, I have a Network Extension application and UI frontend for it. The UI frontend talks to the Network Extension using XPC, as provided by NEMachServiceName. On M2 machine, The application and XPC connection works fine on clean installation. But, when the application is upgraded, the XPC connection keeps failing. Upgrade steps: PreInstall script kills the running processes, both UI and Network Extension Let installation continue PostInstall script to launch the application after installation complete. Following code is successful to the point of resume from UI application NSXPCInterface *exportedInterface = [NSXPCInterface interfaceWithProtocol:@protocol(IPCUIObject)]; newConnection.exportedInterface = exportedInterface; newConnection.exportedObject = delegate; NSXPCInterface *remoteObjectInterface = [NSXPCInterface interfaceWithProtocol:@protocol(IPCExtObject)]; newConnection.remoteObjectInterface = remoteObjectInterface; self.currentConnection = newConnection; [newConnection resume]; But it fails to get the object id<IPCExtObject> providerProxy = [self.currentConnection remoteObjectProxyWithErrorHandler:^(NSError *registerError) { }]; Please note, this only fails for M2. For M1, this exact code is running fine. Additionally, if I uninstall the application by dropping it in Trash and then installing the newer version, then too, the application works fine.

I’m trying to use the TLS Session Resumption feature in TLS 1.2 and 1.3. I first tested this on iOS, but it didn’t work as expected. To investigate via packet capture, I ran the same code on macOS and saw the same issue. Using URLSession to establish a WebSocket connection, I captured packets in Wireshark to check if Session Resumption was working. The behavior differed from what I expected: 1st TLS handshake – Client Hello does not contain the session_ticket extension (required for session resumption per the TLS spec). 2nd TLS handshake – Client Hello does not contain a pre_shared_key. Test apps: https://github.com/sf-jed-kyung/tls-session-resumption-test Test environment: Xcode 16.3, macOS 15.6, OpenSSL 3.5.1 This repo contains: tls-urlsession-macos – WebSocket via URLSession (shows missing extensions). tls-openssl-macos – Manual TLS handshake via OpenSSL (shows both session_ticket and pre_shared_key). To run this, adjust Header Search Paths and Library Search Paths for your local OpenSSL install. URLSession – 1st Client Hello Transport Layer Security TLSv1.3 Record Layer: Handshake Protocol: Client Hello Content Type: Handshake (22) Version: TLS 1.0 (0x0301) Length: 512 Handshake Protocol: Client Hello Handshake Type: Client Hello (1) Length: 508 Version: TLS 1.2 (0x0303) Random: 0502b10cf04223658... Session ID Length: 32 Session ID: e3b276b14f2deaced... Cipher Suites Length: 42 Cipher Suites (21 suites) Compression Methods Length: 1 Compression Methods (1 method) Extensions Length: 393 ... Extension: server_name (len=26) name=echo.websocket.events Extension: extended_master_secret (len=0) Extension: renegotiation_info (len=1) Extension: supported_groups (len=12) Extension: ec_point_formats (len=2) Extension: application_layer_protocol_negotiation (len=11) Extension: status_request (len=5) Extension: signature_algorithms (len=22) Extension: signed_certificate_timestamp (len=0) Extension: key_share (len=43) x25519 Extension: psk_key_exchange_modes (len=2) Extension: supported_versions (len=7) TLS 1.3, TLS 1.2 Extension: compress_certificate (len=3) ... URLSession – 2nd Client Hello Transport Layer Security TLSv1.3 Record Layer: Handshake Protocol: Client Hello Content Type: Handshake (22) Version: TLS 1.0 (0x0301) Length: 512 Handshake Protocol: Client Hello Handshake Type: Client Hello (1) Length: 508 Version: TLS 1.2 (0x0303) Random: 1e485f35ad66c8598... Session ID Length: 32 Session ID: 99d02000c7ed403a5... Cipher Suites Length: 42 Cipher Suites (21 suites) Compression Methods Length: 1 Compression Methods (1 method) Extensions Length: 393 ... Extension: server_name (len=26) name=echo.websocket.events Extension: extended_master_secret (len=0) Extension: renegotiation_info (len=1) Extension: supported_groups (len=12) Extension: ec_point_formats (len=2) Extension: application_layer_protocol_negotiation (len=11) Extension: status_request (len=5) Extension: signature_algorithms (len=22) Extension: signed_certificate_timestamp (len=0) Extension: key_share (len=43) x25519 Extension: psk_key_exchange_modes (len=2) Extension: supported_versions (len=7) TLS 1.3, TLS 1.2 Extension: compress_certificate (len=3) ... OpenSSL – 1st Client Hello Transport Layer Security TLSv1.3 Record Layer: Handshake Protocol: Client Hello Content Type: Handshake (22) Version: TLS 1.0 (0x0301) Length: 1564 Handshake Protocol: Client Hello Handshake Type: Client Hello (1) Length: 1560 Version: TLS 1.2 (0x0303) Random: aec30b0aad542252... Session ID Length: 32 Session ID: f7ee7178cab8716a625... Cipher Suites Length: 60 Cipher Suites (30 suites) Compression Methods Length: 1 Compression Methods (1 method) Extensions Length: 1427 Extension: renegotiation_info (len=1) Extension: server_name (len=26) name=echo.websocket.events Extension: ec_point_formats (len=4) Extension: supported_groups (len=18) Extension: session_ticket (len=0) Extension: application_layer_protocol_negotiation (len=11) Extension: encrypt_then_mac (len=0) Extension: extended_master_secret (len=0) Extension: signature_algorithms (len=54) Extension: supported_versions (len=5) TLS 1.3, TLS 1.2 Extension: psk_key_exchange_modes (len=2) Extension: key_share (len=1258) X25519MLKEM768, x25519 OpenSSL – 2nd Client Hello Transport Layer Security TLSv1.3 Record Layer: Handshake Protocol: Client Hello Content Type: Handshake (22) Version: TLS 1.0 (0x0301) Length: 1716 Handshake Protocol: Client Hello Handshake Type: Client Hello (1) Length: 1712 Version: TLS 1.2 (0x0303) Random: 3fb3938a88166e4eb... Session ID Length: 32 Session ID: 7f13e54a231c17ccff70... Cipher Suites Length: 60 Cipher Suites (30 suites) Compression Methods Length: 1 Compression Methods (1 method) Extensions Length: 1579 Extension: renegotiation_info (len=1) Extension: server_name (len=26) name=echo.websocket.events Extension: ec_point_formats (len=4) Extension: supported_groups (len=18) Extension: session_ticket (len=0) Extension: application_layer_protocol_negotiation (len=11) Extension: encrypt_then_mac (len=0) Extension: extended_master_secret (len=0) Extension: signature_algorithms (len=54) Extension: supported_versions (len=5) TLS 1.3, TLS 1.2 Extension: psk_key_exchange_modes (len=2) Extension: key_share (len=1258) X25519MLKEM768, x25519 Extension: pre_shared_key (len=148) Since the Client Hello is generated by the client, I believe the session_ticket should be included in the first handshake regardless of server support. However, URLSession omits it entirely. Question: How can I enable TLS Session Resumption when using URLSession?

Dear Apple： We encountered a problem when using the Wi-Fi connection feature. When calling the Wi-Fi connection interface NEHotspotConfigurationManager applyConfiguration, it fails probabilistically. After analyzing the air interface packets, it appears that the Apple device did not send the auth message. How should we locate this issue? Are there any points to pay attention to when calling the Wi-Fi connection interface? Thanks

I had noticed that my slaac address changed between one beta and the other, but wasn't sure. Now with the RC 15.4 RC (24E247) I made point of preserving the info before updating from the previous beta. What I noticed is that not only the slaac address changes, but also the my ether address, even though I have it on Fixed in the settings. Is it expected that the ether, and the slaac, not be rotated after a OS update?

Hi, We are trying to use Apple Security API for KeyChain Services. Using the common App Group : Specifying the common app group in the "kSecAttrAccessGroup" field of the KeyChain query, allowed us to have a shared keychains for different apps (targets) in the app group, but this did not work for extensions. Enabling the KeyChain Sharing capability : We enabled the KeyChain Sharing Ability in the extensions and the app target as well, giving a common KeyChain Access group. Specifying this in the kSecAttrAccessGroup field also did not work. This was done in XCode as we were unable to locate it in the Developer portal in Indentifiers. We tried specifying "$AppIdentifier.KeyChainSharingGroup" in the kSecAttrAccessGroup field , but this did not work as well The error code which we get in all these 3 cases when trying to access the Keychain from the extension is error code 25291 (errSecNotAvailable). The Documentation says this error comes when "No Trust Results are available" and printing the error in xcode using the status says "No keychain is available. The online Documentation says that it is possible to share keychain with extensions, but by far we are unable to do it with the methods suggested. Do we need any special entitlement for this or is there something we are missing while using these APIs? We really appreciate any and all help in solving this issue! Thank you

Samsung's Quick Share uses Wi-Fi Aware to achieve one-to-many concurrent sharing. Can Apple's Wi-Fi Aware achieve one-to-many concurrent sharing? Apple's AirDrop does support one-to-many concurrent sharing.

Hello everyone, I'm developing a macOS application with an integrated Content Filter System Extension. Both the main app and the extension are signed with a Developer ID Application provisioning profile. When building in Xcode, I'm encountering an entitlement mismatch error. I've inspected the provisioning profile using the command: security cms -D -i FilterContentExtension-prod-profile.provisionprofile | grep -A 10 com.apple.developer.networking.networkextension And found that the com.apple.developer.networking.networkextension section only contains values with the -systemextension suffix, for example: content-filter-provider-systemextension. However, when I enable Network Extension → Content Filter in Xcode, the .entitlements file is generated with: content-filter-provider. This leads to the error: "Provisioning profile 'FilterContentExtension-prod-profile' doesn't match the entitlements file’s value for the com.apple.developer.networking.networkextension entitlement." My specific questions are: Why does this error occur? How can I use the content-filter-provider entitlement? If I want to use the content-filter-provider entitlement inside com.apple.developer.networking.networkextension for my Content Filter System Extension, what should I do?

We are migrating our iOS app to macOS. On iOS, it works fine. But when I try and run on macOS and connect to the VPN, I am getting an error like failed to fetch /Users/stuart/Library/Developer/Xcode/DerivedData/app-byzvshkqegwzqxgervfswmsughkm/Build/Products/Debug/<app_name>.app/Contents/PlugIns/<network_extension_name>.appex/Contents/_CodeSignature/CodeRequirements-1 error=-10. If I have Settings -> VPN open, it rapidly is connecting and disconnecting. Is there anything I need to do specific to macOS to make this work? Or is this related to a broken code signature? Thanks in advance!

Is there any way to forcibly disable using QUIC? I've noticed this ends up causing issues with our ISP / router, and noticed for many of our customers as well. Creating an ephemeral session doesn't change things, and setting the request to "assumeHttp3Capable" to false doesn't fix things either. We are using Cloudflare Workers as the URL we are hitting, and thus aren't able to disable this server-side.

Hello, I am new to App development, so I am looking for some advice. I want to develop an app for iPhone, which downloads files (pdf, jpg)from a server to the local storage. I also want to get data from the server to be used in my app. This could be a database access or just simple xml files. I want a secure access based on userid and password. Since in a later version, my app should also run on Android Phones, I am reluctant to use iCloud. I was thinking sftp, but that does not seem to be supported for iOS.

Feedback Ticket: FB13812251 Problem Statement: We are currently facing internet connectivity issue with our VPN application where we try to disconnect the VPN from the Packet Tunnel Network Extension using - (void)cancelTunnelWithError:(nullable NSError *)error. Which API to use to disconnect the VPN from Packet Tunnel as VPN app is not running such that device retains its internet connectivity as soon as VPN disconnects. Configuration: We have configured PacketTunnelProvider with the following settings: (NETunnelProviderManager *)tunnelProvider.protocolConfiguration.includeAllNetworks = YES; (NETunnelProviderManager *)tunnelProvider.protocolConfiguration.excludeLocalNetworks = NO; (NETunnelProviderManager *)tunnelProvider.protocolConfiguration.enforceRoutes = NO; These settings are applied from the VPN app and allow us to successfully establish a VPN connection, with all traffic being routed through the tunnel as expected.We are setting above properties to address local net attack. Issue we are facing: However, we encounter a problem when we attempt to disconnect the VPN from. When we call the following method from PacketTunnel network extension: (void)cancelTunnelWithError:(nullable NSError *)error Upon calling this method, the VPN disconnects as expected, but the device loses all internet connectivity and is unable to access any resources. This is not the desired behavior. Observation : Interestingly, when we call the following method from the app side. The VPN disconnects and the device retains its internet connectivity. [enabledConfig.connection stopVPNTunnel]; We would like to achieve the same behavior when disconnecting the VPN from the Network Extension. So we are looking for an API that could be called from NE without causing any internet connectivity issue. Any guidance on how to resolve this issue would be greatly appreciated.

I am trying to make http3 client with Network.framework on Apple platforms. Codes that implement NWConnectionGroup.start with NWListener don't always work with warning below. I assume NWConnectionGroup.newConnectionHandler or NWListener.newConnectionHandler will be called to start connection from the server if it works. nw_protocol_instance_add_new_flow [C1.1.1:2] No listener registered, cannot accept new flow quic_stream_add_new_flow [C1.1.1:2] [-fde1594b83caa9b7] failed to create new stream for received stream id 3 so I tried: create the NWListener -> not work check whether NWConnectionGroup has a member to register or not NWListener -> not work (it doesn't have). use NWConnection instead of NWConnectionGroup -> not work Is my understanding correct? How should I do to set or associate listener with NWConnection/Group for newConnectionHandler is called and to delete wanings? What is the best practice in the case? Sample codes are below. Thanks in advance. // http3 needs unidirectional stream by the server and client. // listener private let _listener: NWListener let option: NWProtocolQUIC.Options = .init(alpn:["h3"]) let param: NWParameters = .init(quic: option) _listener = try! .init(using: param) _listener.stateUpdateHandler = { state in print("listener state: \(state)") } _listener.newConnectionHandler = { newConnection in print("new connection added") } _listener.serviceRegistrationUpdateHandler = { registrationState in print("connection registrationstate") } // create connection private let _group: NWConnectionGroup let options: NWProtocolQUIC.Options = .init(alpn: ["h3"]) options.direction = .unidirectional options.isDatagram = false options.maxDatagramFrameSize = 65535 sec_protocol_options_set_verify_block(options.securityProtocolOptions, {(_: sec_protocol_metadata_t, _: sec_trust_t, completion: @escaping sec_protocol_verify_complete_t) in print("cert completion.") completion(true) }, .global()) let params: NWParameters = .init(quic: options) let group: NWMultiplexGroup = .init( to: .hostPort(host: NWEndpoint.Host("google.com"), port: NWEndpoint.Port(String(443))!)) _group = .init(with: group, using: params) _group.setReceiveHandler {message,content,isComplete in print("receive: \(message)") } _group.newConnectionHandler = {newConnection in print("newConnectionHandler: \(newConnection.state)") } _group.stateUpdateHandler = { state in print("state: \(state)") } _group.start(queue: .global()) _listener.start(queue: .global()) if let conn = _group.extract() { let data: Data = .init() let _ = _group.reinsert(connection: conn) conn.send(content: data, completion: .idempotent) }

I've built a VPN app that is based on wireguard on macOS (I have both AppStore ver. and Developer ID ver). I want to achieve split tunneling function without changing the system route table. Currently, I'm making changes in PacketTunnelProvider: NEPacketTunnelProvider. It has included/excluded routes that function as a split tunnel, just that all changes are immediately reflected on the route table: if I run netstat -rn in terminal, I would see all rules/CIDRs I added, displayed all at once. Since I have a CIDR list of ~800 entries, I'd like to avoid changing the route table directly. I've asked ChatGPT, Claude, DeepSeek, .etc. An idea was to implement an 'interceptor' to intercept all packets in packetFlow(_:readPacketsWithCompletionHandler:), extract the destination IP from each packet, check if it matches your CIDR list, and either reinject it back to the system interface (for local routing) or process it through your tunnel. Well, LLMs could have hallucinations and I've pretty new to macOS programming. I'm asking to make sure I'm on the right track, not going delusional with those LLMs :) So the question is, does the above method sounds feasible? If not, is it possible to achieve split tunneling without changing the route table?

when i am running this app on Iphone13 facing these errors On starting Publisher: failed(-11992: Wi-Fi Aware) [L1 ready, local endpoint: , parameters: udp, traffic class: 700, interface: nan0, local: ::.0, definite, attribution: developer, server, port: 65041, path satisfied (Path is satisfied), interface: nan0[802.11], ipv4, uses wifi, LQM: unknown, service: com.example.apple-samplecode.Wi-FiAwareSample94KV3E626L._sat-fileservice._udp scope:0 route:0 custom:107]: waiting(POSIXErrorCode(rawValue: 50): Network is down) [L1 cancelled, local endpoint: , parameters: udp, traffic class: 700, interface: nan0, local: ::.0, definite, attribution: developer, server, port: 65041, path , service: com.example.apple-samplecode.Wi-FiAwareSample94KV3E626L._sat-fileservice._udp scope:0 route:0 custom:107]: ready [L1 cancelled, local endpoint: , parameters: udp, traffic class: 700, interface: nan0, local: ::.0, definite, attribution: developer, server, port: 65041, path , service: com.example.apple-samplecode.Wi-FiAwareSample94KV3E626L._sat-fileservice._udp scope:0 route:0 custom:107]: failed(-11992: Wi-Fi Aware) OnStarting Subscriber : -11992: Wi-Fi Aware B1 &lt;nw_browse_descriptor application_service _sat-simulation._udp bundle_id=com.example.apple-samplecode.Wi-FiAwareSample94KV3E626L device_types=7f device_scope=ff custom:108&gt;, generic, interface: nan0, multipath service: interactive, attribution: developer: failed(-11992: Wi-Fi Aware)

I am learning how to use DNS-SD from swift and have created a basic CLI app, however I am not getting callback results. I can get results from cli. Something I am doing wrong here? dns-sd -G v6 adet.local 10:06:08.423 Add 40000002 22 adet.local. FE80:0000... dns-sd -B _adt._udp. 11:19:10.696 Add 2 22 local. _adt._udp. adet import Foundation import dnssd var reference: DNSServiceRef? func dnsServiceGetAddrInfoReply(ref: DNSServiceRef?, flags: DNSServiceFlags, interfaceIndex: UInt32, errorCode: DNSServiceErrorType, hostname: UnsafePointer&lt;CChar&gt;?, address: UnsafePointer&lt;sockaddr&gt;?, ttl: UInt32, context: UnsafeMutableRawPointer?) { print("GetAddr'd") print(hostname.debugDescription.utf8CString) print(address.debugDescription.utf8CString) } var error = DNSServiceGetAddrInfo(&amp;reference, 0, 0, DNSServiceProtocol(kDNSServiceProtocol_IPv6), "adet.local", dnsServiceGetAddrInfoReply, nil) print("GetAddr: \(error)") func dnsServiceBrowseReply(ref: DNSServiceRef?, flags: DNSServiceFlags, interfaceIndex: UInt32, errorCode: DNSServiceErrorType, serviceName: UnsafePointer&lt;CChar&gt;?, regType: UnsafePointer&lt;CChar&gt;?, replyDomain: UnsafePointer&lt;CChar&gt;?, context: UnsafeMutableRawPointer?) { print("Browsed") print(serviceName.debugDescription.utf8CString) print(replyDomain.debugDescription.utf8CString) } error = DNSServiceBrowse(&amp;reference, 0, 0, "_adt._udp", nil, dnsServiceBrowseReply, nil) print("Browse: \(error)") Foundation.RunLoop.main.run() Info.plist &lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"&gt; &lt;plist version="1.0"&gt; &lt;dict&gt; &lt;key&gt;NSLocalNetworkUsageDescription&lt;/key&gt; &lt;string&gt;By the Hammer of Grabthor&lt;/string&gt; &lt;key&gt;NSBonjourServices&lt;/key&gt; &lt;array&gt; &lt;string&gt;_adt._udp.&lt;/string&gt; &lt;string&gt;_http._tcp.&lt;/string&gt; &lt;string&gt;_http._tcp&lt;/string&gt; &lt;string&gt;_adt._udp&lt;/string&gt; &lt;/array&gt; &lt;/dict&gt; &lt;/plist&gt;

I am trying to activate an application which sends my serial number to a server. The send is being blocked. The app is signed but not sandboxed. I am running Sequoia on a recent iMac. My network firewall is off and I do not have any third party virus software. I have selected Allow Applications from App Store & Known Developers. My local network is wifi using the eero product. There is no firewall or virus scanning installed with this product. Under what circumstances will Mac OS block outgoing internet connections from a non-sandboxed app? How else could the outgoing connection be blocked?

CFNetwork None CFURLResponseGetRecommendedCachePolicy None 0 CFNetwork None CFHTTPCookieStorageUnscheduleFromRunLoop None 0 CFNetwork None /_/_CFNetworkAgentMessageProcessorMain None 0 CFNetwork None CFURLDownloadCancel None 0 CFNetwork None CFURLDownloadCancel None 0 libdispatch.dylib None /_dispatch/_block/_async/_invoke2 None We've observed intermittent crashes in our production environment, exclusively affecting customers running macOS 10.15 and 11. The crash logs consistently show a stack trace involving CFHTTPCookieStorageUnscheduleFromRunLoop and CFURLDownloadCancel within the CFNetwork framework. This suggests potential issues with cookie storage management and/or URL download cancellation. Could the team please analyze these crash logs and provide insights into: The root cause of the crashes. Potential race conditions or synchronization issues. Recommendations for mitigating or resolving the problem. Your assistance in resolving this issue is greatly appreciated."

how can I prevent handshake when certificate is user installed for example if user is using Proxyman or Charles proxy and they install their own certificates now system is trusting those certificates I wanna prevent that, and exclude those certificates that are installed by user, and accept the handshake if CA certificate is in a real valid certificate defined in OS I know this can be done in android by setting something like <network-security-config> <base-config> <trust-anchors> <certificates src="system" /> </trust-anchors> </base-config> </network-security-config>

I'm establishing a connection with NWListener and NWConnection which is working great. However, if the listener disappears, a lot of logs are appearing: Is there a way to hide these logs? I'm aware of OS_ACTIVITY_MODE=disabled, but that will also hide a lot of other logs. I also know you can hide these using Xcode's filtering. I'm looking for a programmatically way to hide these completely. I'm not interested in seeing these at all, or, at least, I want to be in control. Thanks!

I'm using NWBrowser to search for a server that I hosted. The browser does find my service but when it tries to connect to it, it gets stuck in the preparing phase in NWConnection.stateUpdateHandler. When I hardcode the local IP address of my computer (where the server is hosted) into NWConnection it works perfectly fine and is able to connect. When it gets stuck in the preparing phase, it gives me the warnings and error messages in the image below. You can also see that the service name is correct and it is found. I have tried _http._tcp and _ssh._tcp types and neither work. This is what my code looks like: func findServerAndConnect(port: UInt16) { print("Searching for server...") let browser = NWBrowser(for: .bonjour(type: "_ssh._tcp", domain: "local."), using: .tcp) browser.browseResultsChangedHandler = { results, _ in print("Found results: \(results)") for result in results { if case let NWEndpoint.service(name, type_, domain, interface) = result.endpoint { if name == "PocketPadServer" { print("Found service: \(name) of type \(type_) in domain \(domain) on interface \(interface)") // Construct the full service name, including type and domain let fullServiceName = "\(name).\(type_).\(domain)" print("Full service name: \(fullServiceName), \(result.endpoint)") self.connect(to: result.endpoint, port: port) browser.cancel() break } } } } browser.start(queue: .main) } func connect(to endpoint: NWEndpoint, port: UInt16) { print("Connecting to \(endpoint) on port \(port)...") // endpoint = NWEndpoint( let tcpParams = NWProtocolTCP.Options() tcpParams.enableFastOpen = true tcpParams.keepaliveIdle = 2 let params = NWParameters(tls: nil, tcp: tcpParams) params.includePeerToPeer = true // connection = NWConnection(host: NWEndpoint.Host("xx.xxx.xxx.xxx"), port: NWEndpoint.Port(3000), using: params) connection = NWConnection(to: endpoint, using: params) connection?.pathUpdateHandler = { path in print("Connection path update: \(path)") if path.status == .satisfied { print("Connection path is satisfied") } else { print("Connection path is not satisfied: \(path.status)") } } connection?.stateUpdateHandler = { newState in DispatchQueue.main.async { switch newState { case .ready: print("Connected to server") self.pairing = true self.receiveMessage() case .failed(let error): print("Connection failed: \(error)") self.isConnected = false case .waiting(let error): print("Waiting for connection... \(error)") self.isConnected = false case .cancelled: print("Connection cancelled") self.isConnected = false case .preparing: print("Preparing connection...") self.isConnected = false default: print("Connection state changed: \(newState)") break } } } connection?.start(queue: .main) }