macOS, really, so there are a bunch of things that may be running during various types of sleep. I know I can get notifications from IOKit about the system going to sleep or waking up, but if I've got a daemon that crashed, and is then relaunched automatically, can I tell whether the machine is awake, or in some sort of sleep state other than hibernation?

I've got @Environment(\.managedObjectContext) var context private var home: Home private var predicate: NSPredicate @State var sortBy: SortDescriptor<Room> @FetchRequest private var rooms: FetchedResults<Room> init(home: Home) { self.home = home _sortBy = State(initialValue: SortDescriptor<Room>(\.name)) self.predicate = NSPredicate(format: "%K = %@", "home", self.home) _rooms = FetchRequest<Room>( sortDescriptors: [self.sortBy], predicate: self.predicate) } But it won't compile -- it says Variable 'self.rooms' used before being initialized. But... how?

I was trying to have a date picker show up conditionally; it seems to work for iOS, but macOS (13, haven't tried it on 14 yet) it ... doesn't. In particular, if I select "custom" in this code, and then click on a date part, it brings up the graphical picker, and I can select a date, but then... it doesn't go away. Clearly I am doing something wrong, but is it clear to anyone who isn't me what that is? import SwiftUI extension View { /// Hide or show the view based on a boolean value. /// /// Example for visibility: /// /// Text("Label") /// .isHidden(true) /// /// Example for complete removal: /// /// Text("Label") /// .isHidden(true, remove: true) /// /// - Parameters: /// - hidden: Set to `false` to show the view. Set to `true` to hide the view. /// - remove: Boolean value indicating whether or not to remove the view. @ViewBuilder func isHidden(_ hidden: Bool, remove: Bool = false, disable: Bool = false) -> some View { if hidden { if !remove { self.hidden() .disabled(disable) } } else { self } } } enum ExpireType: CustomStringConvertible, Hashable, CaseIterable { case never case oneWeek case twoWeek case oneMonth case sixMonth case custom func expires(given date: Date) -> Date? { let calendar = Calendar.current switch self { case .never: return nil case .custom: return nil case .oneWeek: return calendar.date(byAdding: .weekOfYear, value: 1, to: Date()) case .twoWeek: return calendar.date(byAdding: .weekOfYear, value: 2, to: Date()) case .oneMonth: return calendar.date(byAdding:.month, value: 1, to: Date()) case .sixMonth: return calendar.date(byAdding: .month, value: 6, to: Date()) } } var description: String { switch self { case .never: return "Never" case .custom: return "Custom" case .oneWeek: return "One week" case .twoWeek: return "Two weeks" case .oneMonth: return "One month" case .sixMonth: return "Six months" } } } struct ExpireDatePicker: View { @State var expires = Date() @State var expireType = ExpireType.never @State var didChange = false @State var dateString = "" @State var showDatePicker = false private func updateText() { if self.expireType == .never { self.dateString = "" } else if self.expireType == .custom { self.dateString = self.expires.formatted(.dateTime.day().month().year()) } else { self.dateString = self.expireType.expires(given: Date())!.formatted(.dateTime.day().month().year()) } } /* * For the expire date, we want to let * the user pick one of the predfined dates, * or a custom date. */ var body: some View { VStack(alignment: .trailing) { let _ = print("showDatePicker \(self.showDatePicker)") Picker("Expiration date", selection: self.$expireType) { ForEach(ExpireType.allCases, id: \.self) { et in Text(String(describing: et)) .tag(et) } } ZStack(alignment: .trailing) { Text(dateString) .fontWeight(.ultraLight) .isHidden(self.showDatePicker, disable: true) /* * This does not work well. * I can't get it to disappear, * or relinquish control */ DatePicker("", selection: self.$expires, displayedComponents: .date) .datePickerStyle(.compact) .isHidden(!self.showDatePicker, disable: true) } } .onChange(of: self.expireType) { to in self.showDatePicker = (to == .custom) self.updateText() } .onChange(of: self.expires) { to in print("expires changed to \(self.expires)") self.showDatePicker = false } } }

As I mentioned elsewhere, I am trying to add a packet filter to our app. I can load load the extension, but I am getting permission denied when I try to save the preferences with it. I am building for release, using a Developer ID Application certificate (macOS, if that wasn't clear). I am starting to worry that I can't do this except on an MDM-managed system.

I added a Home concept to my simple test program, which made the chain be Home has Rooms which have Items. But when I tried using something like let homeID = self.room.home?.id ?? UUID() _items = Query(#Predicate { ($0.room?.home?.id == homeID) == true }) it complained about an illegal ternary. Fine, it's picky so I changed the Item model to have a computed property: var home: Home? { return self.room?.home?.id } but with that, it crashes at runtime, because it can't find the keypath to .home. Is this all expected?

We have a Transparent Proxy Provider, and a Packet Filter. They both get activated on app startup, and then when that's done, I call code to set the preferences to enable them. That is basically done by having the request:didFinishWithResult: method check the identity of the request, determine whether it was activation or deactivation, and then call the appropriate function to do the preferences load/save dance. However, from the logs, it looks like the preferences-handling code sometimes only gets called for one of them (and, strangely, almost always the packet filter). Is this a known issue? I'd guess something about multiple calls to load/save preferences happening at the same time?

The crash is at do { retval = try ModelContainer(for: schema, configurations: [modelConfiguration]) } catch { fatalError("Could not create ModelContainer: \(error)") } When I first set it up, it complained (at run-time) about a lot of issues, mainly items not being optional and I apparently had a couple of @Attribute(.unique)s left. After I got rid of all of those, however, I get the crash there. I assume this is an obvious thing that I am doing wrong, but I can't figure it out.

I didn't think it was possible, but a coworker showed me a screenshot with the SentinelOne content filter having the enabled button greyed out in sysprefs: So how are they doing that?

As mentioned before, we have to network extensions for our app -- a transparent proxy provider, and a packet filter. We just started testing with multiple users, and I'm seeing what seem to me to be very strange results, but they get less strange if the states aren't system-wide. Easiest case: I install while I'm logged in, we install the agents and daemons, start everything up, and the app then goes to activate both extensions. This starts with an OSSystemExtensionRequest for each, and when the completion delegate is invoked, I go to "connect" them, which is where the does the load/save preferences. Barring the apparent timing issue I filed a feedback on, this works. If i then fast-user-switch to a second user, the agent once again starts, and goes through the same process -- it creates an OSSystemExtensionRequest to load them both, the delegate gets invoked, and then it does the connection functions for each. The behaviour might change slightly if the second user is already logged in, but I lost my notes there. At the end of this, I am left with things in a weird-to-me state: For the second user (not an admin), I see three entries in prefs/settings > Network -- one packet filter, and two TPPs. The two TPPs either appear 100% identical, in that they both have the same connection time, or one is connected and the other isn't. For the first user (an admin), I sometimes see 1, 2, or 3 entries -- and the VPNs are not always shown as connected. This is new behaviour for us, so either it's something I'm doing in the connection code, or something in the OS changed. The latter seems unlikely since the machine in question is still running macOS 12.6, but I don't test multiple users very often. If the packet filter is global, and the TPP network connection is per user, this kinda makes sense (but why did we not notice it before?).

It tells me my certificate is bad (doesn't have a private key), and that it needs me to revoke it so it can generate a new one, and I do that, and it loops forever. Oh and I get email from Apple saying it's been revoked. Not sure if it's related but I also can't use a Developer ID certificate. Also says it doesn't have a private key. I even generated a new certificate using openssl so I could make sure I had the private key and the .csr file and still no happiness. I also managed to kill my login keychain at some point, because why not. I've googled and stackoverflowed and nothing works. This is on macOS 13.6.1, and Xcode Version 15.0.1 (15A507). I am frustrated to the point of tears at this point.

I put this into a file: #if DEBUG #warning("Building with debug") #endif It always warns when I build in Xcode -- even when I'm (allegedly) using the Release configuration. I created a new scheme called "Release", and changed the Run > Build Configuration to "Release". (And then I went and changed everything from "Debug" to "Release" in the scheme.) But I always get the warning. (In Xcode. If I use xcodebuild -configuration Release I don't get the warning.)

I've got a core data model, with a name, which I've cleverly called cdName. My view has: @Environment(\.managedObjectContext) private var viewContext @FetchRequest(sortDescriptors: [ SortDescriptor(\Item.cdName), ]) private var items: FetchedResults<Item> and then, later ForEach(self.items, id: \.self) { item in NavigationLink { ItemView(item: item) .environment(\.managedObjectContext, self.viewContext) } label: { LabelWithMenuView(label: item.cdName ?? "<no name>") { ptr in if let newName = ptr { let oldName = item.cdName! item.cdName = newName do { try self.viewContext.save() } catch { print("Could not save rename of \(oldName) to \(newName)") } } (LabelWithMenuView is a view that has an on-hover button which brings up a rename sheet and passes the new name off to the completion handler.) When I do this (macOS)... it does change the name in Core Data, but it doesn't update the view. If I quit&restart my app, it shows up with the new name. What am I doing wrong, please?

Is there a way to find out when the set of keychains changes? ie, when a keychain is added or removed? I searched here and grepped through the headers in Security.framework but nothing leaped out at me -- which could just mean I missed something, as happens frequently. (This is on macOS.)

I asked a similar question last year, and got no responses. I've written a much simpler (no network extension!) case that seems to demonstrate what I'm confused about. Simple app with an XPC service. I have an ObjectiveC class TestObject which has an NSString* and an NSData* (which I never actually use). I have a protocol defined in Swift: @objc protocol XPCTestServiceProtocol { func logData(entry: TestObject) -> Void func logData(entry: TestObject, completion: ((String) -> Void)) } In the Switt XPC service, the code is: class XPCTestService: NSObject, XPCTestServiceProtocol { var totalBytes = 0 var lastName = "" @objc func logData(entry: TestObject) { totalBytes += (entry.data?.count ?? 0) } @objc func logData(entry: TestObject, completion: ((String) -> Void)) { totalBytes += (entry.data?.count ?? 0) completion("Finished") } I've got this code in the ObjC app: id<XPCTestServiceProtocol> proxy = [self.connection remoteObjectProxyWithErrorHandler:^(NSError* error) { self.stopRun = YES; NSLog(@"Proxy got error %@", error); }]; while (self.stopRun == NO) { @synchronized (self) { NSNumber *objNum = [NSNumber numberWithUnsignedLongLong:self.count++]; NSString *objName = [NSString stringWithFormat:@"Object %@", objNum]; TestObject __weak *toWeak = to; #if USE_COMPLETION [proxy logDataWithEntry:to completion:^(NSString *str) { to = nil; }]; #else [proxy logDataWithEntry:to]; #endif } } attached to a start button (and self.stopRun is set by a stop button, this is all super simple). So I run that, start the test, and things start going (122k calls/second it says). According to Activity Monitor, my app is using about 1gbyte after 20 seconds or so. However, if I run it under Instruments' Leaks template... Activity Monitor says it's used only about 60mbytes. (And at the end of the run, Instruments says it's used about 30mbytes.) Now... if I use the completion and a synchronous proxy, then even without Instruments, Activity Monitor says it's 60mbytes or so. Is the memory reported by Activity Monitor real? Or not real?

Looking at the path name for reasons, and ran into a thing: one of my coworkers was not getting /Applications/Safari.app as expected, but instead got /System/Volumes/Preboot/Cryptexes/App/System/Applications/Safari.app. Which is annoying because I'm actually using spotlight to find the paths for applications, and that one doesn't show up. Has anyone run into this? And know why? (I figure I'll simply remove the prefix if it's there, and that should be fine, but I'm curious why it only seems to happen sometimes.)