I just noticed that when closing a new document with edits in MacOS Sonoma that it skips the Save/Don't Save/Cancel panel and goes directly to default NSSavePanel with Delete/Cancel/Save buttons. The problem is that when I click "Delete" nothing happens. It should have simple solution, but I could not find anything. How does one respond to the "Delete" button? My undocumented (as far as I can tell) hack was to implement document:didSave:contextinfo selector for runModalSavePanelForSaveOperation. It appears that in this method for a new document: Delete button has didSave=YES (even though it did not save) and the document fileURL nil Cancel button has didSave=NO and document fileURL nil Save button has didSave=YES and document filieURL to saved file I can handle Delete button this way, but since it is not a documented method, it make me uncomfortable. For example what happens is user clicks "Save", but the save has an error? As an aside, since Apple is now working with ChatGPT, I thought it might provide some help. I asked it how I can respond to "Delete" button in MacOS Sonoma and it said to implement deleteDocument: in your NSDocument subclass. I pointed out to ChatGPT that deleteDocument: does not exist. It said "you are correct" and you should instead check the returned result from runModalSavePanelForSaveOperation and look for "stop" action. I pointed out to ChatGPT that runModalSavePanelForSaveOperation is void and does not return a result, it said again, "you are correct." It gave a third option which basically said to override runModalSavePanelForSaveOperation and build your own save panel from scratch. I didn't know if I should trust this answer. I reverted to my hack and wrote this post. Also ChatGPT never apologized for wasting my time with the wrong answers.

Hello everybody! How to resize a window using a keyboard shortcut in MacOS Sequoia. Please if who know help me!

I saw this thread https://forums.developer.apple.com/forums/thread/69888 and I need to not open a new default window just because the app is brought to the front without having any windows open. Unfortunately, that isn't working any more under Sonoma 14.5. Here's my code: // Let's not open default window just because we're being brought to the front. -(BOOL)applicationShouldHandleReopen { return NO; } -(BOOL)applicationShouldOpenUntitledFile { return NO; } I have breakpoints set on both return statements, but they are never hit.

I'm seeing many apps, when restoring their state from a previous launch, have trouble opening windows to the space and minimized state they were last. What do I need to do so my AppKit app doesn't have this problem?

A user of my app, which shows subtitles loaded from a text file above a video loaded from another file, reported that it crashes within minutes of launching it. The user confirmed that the crash only happens when they load a video within the app; if they use it without a video, it doesn't crash. The subtitles are shown in a NSTextView added to AVPlayerView.contentOverlayView. What could cause such a crash? I'm not able to reproduce it. (I tried attaching the full crash report but I always got a validation error "This post contains sensitive language. Please revise it in order to continue.") Crashed Thread: 0 Dispatch queue: com.apple.main-thread Exception Type: EXC_BREAKPOINT (SIGTRAP) Exception Codes: 0x0000000000000001, 0x000000019c50cae8 Termination Reason: Namespace SIGNAL, Code 5 Trace/BPT trap: 5 Terminating Process: exc handler [20614] Application Specific Backtrace 0: 0 CoreFoundation 0x0000000198a472ec __exceptionPreprocess + 176 1 libobjc.A.dylib 0x000000019852e788 objc_exception_throw + 60 2 Foundation 0x0000000199b2caa0 -[NSKeyValueNestedProperty object:withObservance:didChangeValueForKeyOrKeys:recurse:forwardingValues:] + 664 3 Foundation 0x0000000199af4e08 -[NSKeyValueUnnestedProperty object:withObservance:didChangeValueForKeyOrKeys:recurse:forwardingValues:] + 196 4 Foundation 0x0000000199b8bc54 NSKeyValueDidChange + 200 5 Foundation 0x0000000199acde1c -[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:maybeNewValuesDict:usingBlock:] + 684 6 Foundation 0x0000000199af7484 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:] + 64 7 Foundation 0x0000000199b110e8 _NSSetObjectValueAndNotify + 284 8 AVKit 0x00000001bd3ff694 -[AVPlayerControlsViewController setPlayerController:] + 376 9 Foundation 0x0000000199acddd0 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:maybeNewValuesDict:usingBlock:] + 608 10 Foundation 0x0000000199af7484 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:] + 64 11 Foundation 0x0000000199b110e8 _NSSetObjectValueAndNotify + 284 12 AVKit 0x00000001bd3c6e68 -[AVPlayerView setPlaybackControlsViewController:] + 88 13 Foundation 0x0000000199b11074 _NSSetObjectValueAndNotify + 168 14 AVKit 0x00000001bd40f4b8 -[AVPlayerView _updatePlaybackControlsViewControllerIfNeeded] + 536 15 AVKit 0x00000001bd3cc0b4 -[AVPlayerView viewDidMoveToWindow] + 136 16 AppKit 0x000000019c24456c -[NSView _setWindow:] + 1788 17 AppKit 0x000000019ccce4a0 __21-[NSView _setWindow:]_block_invoke.146 + 268 18 AppKit 0x000000019c244564 -[NSView _setWindow:] + 1780 19 AppKit 0x000000019ccce4a0 __21-[NSView _setWindow:]_block_invoke.146 + 268 20 AppKit 0x000000019c244564 -[NSView _setWindow:] + 1780 ... 35 AppKit 0x000000019ccce4a0 __21-[NSView _setWindow:]_block_invoke.146 + 268 36 AppKit 0x000000019c244564 -[NSView _setWindow:] + 1780 37 AppKit 0x000000019c428ec0 -[NSWindow dealloc] + 684 38 Foundation 0x000000019a1fa118 _NSKVOPerformWithDeallocatingObservable + 172 39 Foundation 0x0000000199b17404 NSKVODeallocate + 180 40 Foundation 0x0000000199b122f0 empty + 88 41 Foundation 0x0000000199af77fc dealloc + 60 42 Foundation 0x0000000199af7740 -[NSConcreteMapTable dealloc] + 76 43 AppKit 0x000000019c936e80 ___NSTouchBarFinderSetNeedsUpdateOnMain_block_invoke_2 + 1388 44 AppKit 0x000000019c2d4c4c NSDisplayCycleObserverInvoke + 168 45 AppKit 0x000000019c2d48a8 NSDisplayCycleFlush + 644 46 QuartzCore 0x00000001a0bc3f64 _ZN2CA11Transaction19run_commit_handlersE18CATransactionPhase + 120 47 QuartzCore 0x00000001a0bc2d04 _ZN2CA11Transaction6commitEv + 320 48 AppKit 0x000000019c3589d0 __62+[CATransaction(NSCATransaction) NS_setFlushesWithDisplayLink]_block_invoke + 272 49 AppKit 0x000000019cd18208 ___NSRunLoopObserverCreateWithHandler_block_invoke + 64 50 CoreFoundation 0x00000001989d187c __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 36 51 CoreFoundation 0x00000001989d1768 __CFRunLoopDoObservers + 536 52 CoreFoundation 0x00000001989d0d94 __CFRunLoopRun + 776 53 CoreFoundation 0x00000001989d0434 CFRunLoopRunSpecific + 608 54 HIToolbox 0x00000001a317419c RunCurrentEventLoopInMode + 292 55 HIToolbox 0x00000001a3173e2c ReceiveNextEventCommon + 220 ... Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 AppKit 0x19c50cae8 -[NSApplication _crashOnException:] + 240 1 AppKit 0x19c358b44 __62+[CATransaction(NSCATransaction) NS_setFlushesWithDisplayLink]_block_invoke + 644 2 AppKit 0x19cd18208 ___NSRunLoopObserverCreateWithHandler_block_invoke + 64 3 CoreFoundation 0x1989d187c __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 36 4 CoreFoundation 0x1989d1768 __CFRunLoopDoObservers + 536 5 CoreFoundation 0x1989d0d94 __CFRunLoopRun + 776 6 CoreFoundation 0x1989d0434 CFRunLoopRunSpecific + 608 7 HIToolbox 0x1a317419c RunCurrentEventLoopInMode + 292 8 HIToolbox 0x1a3173e2c ReceiveNextEventCommon + 220 9 HIToolbox 0x1a3173d30 _BlockUntilNextEventMatchingListInModeWithFilter + 76 10 AppKit 0x19c22fd68 _DPSNextEvent + 660 11 AppKit 0x19ca25808 -[NSApplication(NSEventRouting) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 700 12 AppKit 0x19c22309c -[NSApplication run] + 476 13 AppKit 0x19c1fa2e0 NSApplicationMain + 880 14 Underword 0x102c099ac 0x102c08000 + 6572 15 dyld 0x19856a0e0 start + 2360

Hi, I just did a NSTextField with auto complete that show a cities menu bar the problem is when I typing the first letter, the focus change to the menubar and if I try to write another letter it just replace the first letter and not add it how can I fix it? Thank you! class NSTextFieldAuto: NSTextField, NSMenuDelegate, NSTextFieldDelegate { var suggestionMenu: NSMenu? var selectedSuggestionIndex: Int? override func awakeFromNib() { super.awakeFromNib() self.delegate = self self.suggestionMenu = NSMenu() self.suggestionMenu?.delegate = self } override func mouseDown(with event: NSEvent) { super.mouseDown(with: event) // Deselect all text when the text field is clicked } override func textDidChange(_ notification: Notification) { super.textDidChange(notification) print("Still typing") updateSuggestionMenu() showSuggestionMenu() } override func textDidEndEditing(_ notification: Notification) { print("Finished typing") cityDef.setValue(self.stringValue, forKey: cityDefKey) } func updateSuggestionMenu() { self.suggestionMenu?.removeAllItems() let searchText = self.stringValue.lowercased() for (index, city) in allCities.enumerated() { if city.lowercased().hasPrefix(searchText) { let item = NSMenuItem(title: city, action: #selector(selectSuggestion(_:)), keyEquivalent: "") item.target = self self.suggestionMenu?.addItem(item) } } } func showSuggestionMenu() { if let menu = self.suggestionMenu, !menu.items.isEmpty { let textFieldRect = self.bounds let origin = NSPoint(x: textFieldRect.origin.x + 100.0, y: textFieldRect.origin.y + textFieldRect.size.height) menu.autoenablesItems = false menu.popUp(positioning: nil, at: origin, in: self) } } @objc func selectSuggestion(_ sender: NSMenuItem) { self.stringValue = sender.title } override func cancelOperation(_ sender: Any?) { self.suggestionMenu?.cancelTracking() self.window?.becomeFirstResponder() } func menuDidClose(_ menu: NSMenu) { self.window?.makeFirstResponder(self) // Set text field as first responder again print("Close menu") } override func becomeFirstResponder() -> Bool { let result = super.becomeFirstResponder() self.selectedSuggestionIndex = nil // Reset selected suggestion index return result } }

I have the following code: + (BOOL)activateWindow:(NSWindow*)window { if (NSApp.activationPolicy != NSApplicationActivationPolicyRegular) [NSApp setActivationPolicy:NSApplicationActivationPolicyRegular]; if (window) { [NSApp activate]; //if (window.isMiniaturized) [window deminiaturize:nil]; [window makeKeyAndOrderFront:nil]; } return YES; } + (BOOL)hideWindowFromDock:(NSWindow*)window { if (NSApp.activationPolicy != NSApplicationActivationPolicyProhibited) [NSApp setActivationPolicy:NSApplicationActivationPolicyProhibited]; window.isVisible = NO; return YES; } I hide app main window by setting NSApplicationActivationPolicyProhibited if it is minimized or being closed. The code worked most of the time. But since upgrading to Sonoma, sometimes it won't correctly activate main window. The window icon reappears in the dock, but the window won't show up. I have to click on the window icon again to let it 'order front'. Sometimes, I observe a very weird behavior of the window being activated. It 'order front' and then disappears and re-appears.

I have an NSTextLayoutManager set up with NSTextContentStorage and NSTextContainer. To work out the height of the content, I call the method updateContentSizeIfNeeded() which contains the code textLayoutManager.enumerateTextLayoutFragments(from: textLayoutManager.documentRange.endLocation, options: [.reverse, .ensuresLayout]) { layoutFragment in height = layoutFragment.layoutFragmentFrame.maxY return false } The first time this is called, it returns the correct height. Then I add a new character to the start of the NSTextContentStorage like so textContentStorage.performEditingTransaction { storage.replaceCharacters(in: NSRange(location:0, length: 1), with: "a") } textLayoutManager.ensureLayout(for: textLayoutManager.documentRange) textLayoutManager.textViewportLayoutController.layoutViewport() updateContentSizeIfNeeded() This time, the height returned is ~600px too big. The state of the NSTextLayoutFragment is set to layoutAvailable The next time I add a character to textContentStorage using the same code above, the height returned is correct again. I can work around this by calling enumerateTextLayoutFragments from the start of the document and not in reverse, then ignoring all fragments except the last one, but I don't know if that's the correct way to do it, or if I should be doing something else

We would like to be able to modify the display name of our app in the dock and finder (etc) but not change the name of the .app bundle. We've tried modifying CFBundleName and CFBundleDisplayName in Info.plist, but this doesn't seem to have an effect. Is there any way to have the displayed name be different from the base name of the app bundle? We want this to apply for all languages. Thanks!

When the user makes changes in my document, I call document.updateChangeCount(.changeDone) which seems to successfully mark the document as changed - the close button has a dot, the proxy icon is disabled, and when closing/quitting I get the save prompt. The problem is that the File > Save command is never enabled, so saving/quitting is the only way I can get it to save. I'm not overriding any menu validation methods in my NSDocument subclass. I do have a validateMenuItem() in my main view controller, but it's only for a popup menu, and setting a breakpoint there confirms that it only gets called for the popup. What else could be preventing Save from getting enabled? Edit: I tried overriding validateUserInterfaceItem() to return true when appropriate, which works, although the Save command then appears as "Save..." so apparently I'm also responsible for updating the title. In any case this seems like it shouldn't be necessary. I wonder if it's because I implement saving in save(to:ofType:for:completionHandler:) rather than one of the other possibilities. I was going to try wirte(to:ofType) instead but that is surprisingly nonisolated, so I'm not sure how I'm expected to safely access my data model from there. I can't do data(ofType:) because saving may involve writing to multiple files.

Is there any way to tell if the user clicked X button in windowWillClose delegate method? - (void)windowWillClose:(NSNotification *)notification

I am unfortunately faced with a large legacy code base in which Storyboards are heavily used. Now, for some reason, the entire app window is resized if a certain View Controller becomes visible. The issue: Apparently, there aren't any conflicting layout constraints (no LAYOUT_CONSTRAINTS_NOT_SATISFIABLE errors are raised on display of the view controller). There are also no calls to setFrame on the corresponding window. So, how do I debug this? Capturing the view hierarchy didn't provide any helpful insights, and ideally I could just force the window to not resize (due to possible constraint errors). Is there any way to achieve something like this? If not, how can I go about debugging this? Any help on this would be greatly appreciated.

In our Mac Catalyst app running on macOS, the Edit > Spelling and Grammar > Check Spelling While Typing, Check Grammar With Spelling, and Correct Spelling Automatically preferences are reset with each opening of a new text view. How can we make those preferences persistent? Ie, when someone changes those settings for our app's text view, other incarnations of our app's text views should respect the latest preferences. We looked at swizzling NSTextView's toggleAutomaticSpellingCorrection:, saving those to NSUserDefaults, and then reading those preferences when we set up our UITextView subclass, and then setting the UITextInputTraits properties accordingly. However, our approach felt heavy handed, and I'm wondering if we are missing some out-of-the-box functionality that will make those preferences intuitively persistent. Does anyone have any suggestions? Thank you.

My Xcode workspace contains build settings for a macOS, iOS, and tvOS application. My Sandbox macOS app builds just fine and works great - and is on the App Store. I am in the process of creating a new build / branch of this app that is not Sandboxed so that I can add IPC (Syphon support) - as I don't think I can use App Groups to enable CFMessage support (which Syphon requires) because Syphon (third party framework) - uses its own naming convention for the ports. Anyway, sandbox support for a Syphon app is a topic for another day (it's actually quite disappointing that I can't release a Syphon version on the App Store). The trouble I am having, is that even afer deleting the App Sandbox entitlement from my project, my App still seems to be running in the App Sandbox, and I can't figure out how to remove the App Sandbox entitlement completely. What I am seeing, is that even after deleting the App Sandbox entitlement (using the project settings and deleting it in the "Signing and Capabilities" tab (and also checking the entitlements file manually to doubly make sure it is gone) - I am still seeing the following error message: *** CFMessagePort: bootstrap_register(): failed 1100 (0x44c) 'Permission denied', port = 0x8703, name = 'info.v002.Syphon.332143F7-0916-428A-A88A-59B752F95304' See /usr/include/servers/bootstrap_defs.h for the error codes. It is also saving my Application Support data in the ~/Library/Containers folder, and not in ~/Library/ApplicationSupport What step am I missing?

By Implementing the TipKit framework in the AppKit Mac OS application, we were unable to close the popover when we clicked on the cross icon presented in TipNSPopover view. And any clues about how to implement the TipNSPopover on Handover of NScollectionview ?. When the mouse enters any of the collection view cells, I have to present the TipNSpopover view. Please share your input and thoughts.

I'd like to know how to test behavior in Swift on Desktop that needs to interact with external elements, in my case the Finder. My goal is simple: add an option in the right-click menu of the Finder that will open my application with the selected entry or entries (file or folder) from the Finder. I have thus set the elements NSMenuItem, NSMessage, NSPortName, NSRequiredContext (NSApplicationIdentifier: com.apple.finder) etc. I also created a class FinderService with a function performService having this declaration: func performService(_ pboard: NSPasteboard, userData: String, error: AutoreleasingUnsafeMutablePointer<NSString>) { NSLog("performService called!") } And I instantiated my class like this: NSApplication.shared.servicesProvider = FinderService(). However, when I build and launch the application nothing happens, well my application runs fine and the instantiation of the class seems to be correctly called. But when I open my Finder, my action is not displayed in the right-click context menu. And in the logs of my application, no error appears. How can I test this?

I wanted to identify the shutdown event in macOS, so that If my application is running and the user performs a system shutdown then my application could be notified of the shutdown event and perform finalization. I came across NSWorkspaceWillPowerOffNotification which is exactly what I require, however, I created a sample application to observe for this notification. Is is observed that right before the system shuts down, the OS terminates my application invoking applicationWillTerminate(_:) delegate and the observer method for 'NSWorkspaceWillPowerOffNotification' is not invoked. I could perform my finalization in the applicationWillTerminate, but I wanted to know why is the observer not getting invoked. Also why is NSWorkspaceWillPowerOffNotification, even provided by apple when it invoked the termination delegate before shutdown? below is how I m adding the observer: NotificationCenter.default.addObserver(forName: NSWorkspace.willPowerOffNotification, object: nil, queue: nil, using: AppDelegate.handlePowerOffNotification) Below is my observer function, which just logs: public static func handlePowerOffNotification(_ notification: Notification) { NSLog (AppDelegate.TAG + "System will power off soon! Perform any necessary cleanup tasks.") // custom logger to log to a file TWLog.Log ("System will power off soon! Perform any necessary cleanup tasks.") }

I need to draw an outline of an Emoji glyph bounding box that is drawn in CGContext (macOS 14.4.1). I use NSLayoutManager - (void)drawGlyphsForGlyphRange:(NSRange)glyphsToShow atPoint:(NSPoint)origin; and I can get an emoji glyph bounding box using CoreText CGRect CTFontGetBoundingRectsForGlyphs(CTFontRef font, CTFontOrientation orientation, const CGGlyph *glyphs, CGRect *boundingRects, CFIndex count);. The bounding box is correct until the CGContext to which I draw the string with Emoji is not scaled or rotated. In such a case, an Emoji drawn in context is "sometimes" scaled, so its bounding box is not equal to the bounding box obtained from CoreText. Unfortunately, I can't figure out what the dependencies between glyph size, CGContext rotation, and scale are. I couldn't find any linearity between these variables. For example, an Emoji is drawn correctly at scale 6, rotation 0, when CGContext is rotated by 1 degree, Emoji is downsized by 1 pixel, then back in nominal size when rotation is between 2 and 4 degrees, then downsized for 5 degrees, nominal at 6, etc. Has anyone solved this?

My app is crashing in CoreGraphics. As per the observations, it started crashing for Mac OS 14.4 and 14.4.1 on Arm machines. It is observed on multiple machines. Can someone please help on this? Following is the backtrace: Process: MyApp [1300] Path: /Applications/MyApp.app/Contents/MacOS/MyApp Identifier: com.MyCompany.MyApp Version: 7.2.3 (???) Code Type: ARM-64 (Native) Parent Process: launchd [1] User ID: 502 Date/Time: 2024-04-23 20:48:08.7647 +0530 OS Version: macOS 14.4.1 (23E224) Report Version: 12 Anonymous UUID: 6DAE9C94-37AC-96D0-7221-3AAA99D9E5F6 Sleep/Wake UUID: 03812728-62F0-45A4-86FC-07E151462C11 Time Awake Since Boot: 11000 seconds Time Since Wake: 1385 seconds System Integrity Protection: enabled Crashed Thread: 0 Dispatch queue: com.apple.main-thread Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000008 Exception Codes: 0x0000000000000001, 0x0000000000000008 Termination Reason: Namespace SIGNAL, Code 11 Segmentation fault: 11 Terminating Process: exc handler [1300] VM Region Info: 0x8 is not in any region. Bytes before following region: 4338843640 REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL UNUSED SPACE AT START ---> __TEXT 1029d8000-1029e4000 [ 48K] r-x/r-x SM=COW /Applications/MyApp.app/Contents/MacOS/MyApp Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 CoreGraphics 0x186aabdac shape_union + 656 1 CoreGraphics 0x186aababc shape_union_with_bounds + 128 2 CoreGraphics 0x186aab9f4 CGRegionCreateUnionWithRect + 240 3 AppKit 0x184b439dc 0x18473e000 + 4217308 4 AppKit 0x184b2ad4c 0x18473e000 + 4115788 5 AppKit 0x184dc358c -[NSViewBackingLayer setNeedsDisplayInRect:] + 176 6 AppKit 0x184790874 -[NSView setNeedsDisplayInRect:] + 396 7 Foundation 0x182070914 __NSThreadPerformPerform + 264 8 CoreFoundation 0x180f21eb0 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 28 9 CoreFoundation 0x180f21e44 __CFRunLoopDoSource0 + 176 10 CoreFoundation 0x180f21bb4 __CFRunLoopDoSources0 + 244 11 CoreFoundation 0x180f207a0 __CFRunLoopRun + 828 12 CoreFoundation 0x180f1fe0c CFRunLoopRunSpecific + 608 13 HIToolbox 0x18b6bb000 RunCurrentEventLoopInMode + 292 14 HIToolbox 0x18b6bae3c ReceiveNextEventCommon + 648 15 HIToolbox 0x18b6bab94 _BlockUntilNextEventMatchingListInModeWithFilter + 76 16 AppKit 0x184778970 _DPSNextEvent + 660 17 AppKit 0x184f6adec -[NSApplication(NSEventRouting) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 700 18 AppKit 0x18476bcb8 -[NSApplication run] + 476 19 libffi.dylib 0x191df8050 ffi_call_SYSV + 80 20 libffi.dylib 0x191e00ae0 ffi_call_int + 1212 21 _objc.cpython-39-darwin.so 0x10700a47c PyObjCFFI_Caller_SimpleSEL + 1204 22 _objc.cpython-39-darwin.so 0x107034e94 objcsel_vectorcall_simple + 768 23 Python 0x104312ddc call_function + 124 24 Python 0x104311ac0 _PyEval_EvalFrameDefault + 29288 25 Python 0x10427a720 _PyFunction_Vectorcall + 628 26 Python 0x104312ddc call_function + 124 27 Python 0x104311ac0 _PyEval_EvalFrameDefault + 29288 28 Python 0x10427a57c _PyFunction_Vectorcall + 208 29 Python 0x104312ddc call_function + 124 30 Python 0x104311a4c _PyEval_EvalFrameDefault + 29172 31 Python 0x10427a57c _PyFunction_Vectorcall + 208 32 Python 0x104312ddc call_function + 124 33 Python 0x104311ac0 _PyEval_EvalFrameDefault + 29288 34 Python 0x10427a57c _PyFunction_Vectorcall + 208 35 Python 0x104312ddc call_function + 124 36 Python 0x104311aec _PyEval_EvalFrameDefault + 29332 37 Python 0x10427a57c _PyFunction_Vectorcall + 208 38 Python 0x104312ddc call_function + 124 39 Python 0x104311aec _PyEval_EvalFrameDefault + 29332 40 Python 0x1043131a0 _PyEval_EvalCode + 620 41 Python 0x10430a7d0 PyEval_EvalCode + 80 42 MyApp 0x1029dd440 0x1029d8000 + 21568 43 MyApp 0x1029dd7c0 0x1029d8000 + 22464 44 dyld 0x180aba0e0 start + 2360

I'm trying to bind a NSProgressIndicator to Progress, but with the following code I only get an indeterminate progress indicator with a blue bar forever bouncing left and right, even after the two timers fire. According to the documentation: Progress is indeterminate when the value of the totalUnitCount or completedUnitCount is less than zero or if both values are zero. What am I doing wrong? class ViewController: NSViewController { let progress = Progress() override func loadView() { view = NSView(frame: CGRect(x: 0, y: 0, width: 500, height: 500)) let progressIndicator = NSProgressIndicator(frame: CGRect(x: 100, y: 100, width: 100, height: 100)) progressIndicator.bind(.isIndeterminate, to: progress, withKeyPath: "isIndeterminate") progressIndicator.bind(.value, to: progress, withKeyPath: "completedUnitCount") progressIndicator.bind(.maxValue, to: progress, withKeyPath: "totalUnitCount") progressIndicator.startAnimation(nil) view.addSubview(progressIndicator) progress.completedUnitCount = 3 progress.totalUnitCount = 10 Timer.scheduledTimer(withTimeInterval: 1, repeats: false) { _ in print(1) self.progress.completedUnitCount = 6 } Timer.scheduledTimer(withTimeInterval: 6, repeats: false) { _ in print(2) self.progress.completedUnitCount = 0 self.progress.totalUnitCount = 0 } } }