If I use [UTType exportedTypeWithIdentifier:] to get one of the types in my app's Info.plist, and then ask for the preferredFilenameExtension of that UTType, I get the wrong extension, i.e., not the first file extension listed for that UTI in my Info.plist. Is this one of those situations where AppKit is looking in some database that can get out of sync with what's actually in the Info.plist?

I'm building an open-source framework called OgreNextMain on macOS, and it statically links to an open-source library called FreeImage. When I run the nm -gU command on the binary within the resulting framework, I see lots of the symbols from FreeImage, but a couple that I wanted to use are missing. I thought, maybe they get stripped if they are not called by OgreNextMain, so I looked into stripping options. The "strip style" in the Xcode build settings for OgreNextMain is set to "debugging symbols". I tried setting the "additional strip flags" build setting to have the "-s" option and the path to a file containing the names of the symbols I want, but that didn't have any effect.

When I try to make a unit test target for my macOS app that uses Objective-C, running tests fails, and the debugging log shows a message "Creating more than one Application". If, on the other hand, when I create the unit test target, I select "None" as the target to be tested, and then add all my sources to that target, my tests work. So, I can get my testing done, but I think I must be doing something wrong. By the way, along with the error message, there is a stack crawl: 0 CoreFoundation 0x00007ff8140410aa __exceptionPreprocess + 242 1 libobjc.A.dylib 0x00007ff813b660b7 objc_exception_throw + 48 2 Foundation 0x00007ff814f19bd8 -[NSCalendarDate initWithCoder:] + 0 3 AppKit 0x00007ff817030062 -[NSApplication init] + 1718 4 XCTestCore 0x000000010774b0df -[XCTestDriver _createTestBundlePrincipalClassInstance] + 82 5 XCTestCore 0x0000000107749338 -[XCTestDriver _runTests] + 111 6 XCTestCore 0x000000010770f194 _XCTestMain + 126 7 libXCTestBundleInject.dylib 0x0000000106e8982d __copy_helper_block_e8_32s + 0 8 CoreFoundation 0x00007ff813fc9a91 __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12 9 CoreFoundation 0x00007ff813fc99ca __CFRunLoopDoBlocks + 398 10 CoreFoundation 0x00007ff813fc883d __CFRunLoopRun + 898 11 CoreFoundation 0x00007ff813fc7e51 CFRunLoopRunSpecific + 560 12 HIToolbox 0x00007ff81da52f3d RunCurrentEventLoopInMode + 292 13 HIToolbox 0x00007ff81da52b84 ReceiveNextEventCommon + 199 14 HIToolbox 0x00007ff81da52aa8 _BlockUntilNextEventMatchingListInModeWithFilter + 64 15 AppKit 0x00007ff8170689d8 _DPSNextEvent + 858 16 AppKit 0x00007ff817067882 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1214 17 AppKit 0x00007ff817059ef7 -[NSApplication run] + 586 18 AppKit 0x00007ff81702e111 NSApplicationMain + 817 19 PlainCalc 0x00000001057d0a91 main + 65 20 dyld 0x00007ff813b93418 start + 1896

I have a document-based macOS app written in Objective-C, and each document window contains a scrollable NSTextView. I know that printing can get complicated if you want to do nice pagination, but is there a quick and dirty way to get basic printing working? As it is, the print panel shows up, but its preview area is totally blank. Here's the current printing part of my NSDocument subclass. - (NSPrintInfo *)printInfo { NSPrintInfo *printInfo = [super printInfo]; [printInfo setHorizontalPagination: NSPrintingPaginationModeFit]; [printInfo setHorizontallyCentered: NO]; [printInfo setVerticallyCentered: NO]; [printInfo setLeftMargin: 72.0]; [printInfo setRightMargin: 72.0]; [printInfo setTopMargin: 72.0]; [printInfo setBottomMargin: 72.0]; return printInfo; } - (void)printDocumentWithSettings:(NSDictionary<NSPrintInfoAttributeKey, id> *)printSettings showPrintPanel:(BOOL)showPrintPanel delegate:(id)delegate didPrintSelector:(SEL)didPrintSelector contextInfo:(void *)contextInfo { NSPrintInfo* thePrintInfo = [self printInfo]; [thePrintInfo setVerticallyCentered: NO ]; NSPrintOperation *op = [NSPrintOperation printOperationWithView: _textView printInfo: thePrintInfo ]; [op runOperationModalForWindow: _docWindow delegate: delegate didRunSelector: didPrintSelector contextInfo: contextInfo]; }

If I use the new beta Icon Composer to make a .icon file for a macOS app, will it work for any macOS versions before 26? If not, can one build with both the .icon and the older asset collection icon?

I have some working Objective-C code that displays a WKWebView and allows printing that content. However, it uses the method -[WKWebView printOperationWithPrintInfo:], which the documentation says is deprecated as of macOS 10.15. However, it doesn't say why this method is deprecated, or what the recommended replacement is. The declaration in WKWebView.h does not even indicate that the method is deprecated. But as an alternative, I tried using +[NSPrintOperation printOperationWithView:printInfo]. Doing it that way just prints a blank page. So, should I keep doing it the doubtful way?

When I tried turning on ENABLE_ENHANCED_SECURITY = YES in an Xcode 26.1 beta project, I got a bunch of "module file not found" errors like this: While building module 'CoreServices': In file included from <module-includes>:1: /Applications/Xcode26.1-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/CoreServices.framework/Headers/CoreServices.h:19:2: fatal error: module file '/Volumes/Work/Xcode-derived/PlainCalc3-gixjfymjqamwmufdwcseugzjehqa/Build/Intermediates.noindex/ExplicitPrecompiledModules/CoreFoundation-5POB3HW0BHFSPWLD7DOOKAULM.pcm' not found: module file not found 19 | #include <CoreFoundation/CoreFoundation.h> | ^ I tried deleting the project's derived data. Is this a known issue?

I've recently switched from using Xcode 15 under Ventura to using Xcode 26 under Sequoia on an Intel-CPU Mac. This is a macOS project that uses a legacy build location, and the sources are C++ and Objective-C. For every source being compiled, I get a clang warning "no such include directory" for these 4 directories: $BUILD_DIR/Debug/include $BUILD_DIR/SBEngineV4.build/Debug/V4 Dual SBEngine.build/DerivedSources-normal/x86_64 $BUILD_DIR/SBEngineV4.build/Debug/V4 Dual SBEngine.build/DerivedSources/x86_64 $BUILD_DIR/SBEngineV4.build/Debug/V4 Dual SBEngine.build/DerivedSources I can't figure out where it's getting those directories. I added a Run Script build phase that says echo $HEADER_SEARCH_PATHS, and the first path that reports is the $BUILD_DIR/Debug/include path, yet I don't see that when I look at the header search paths in the target build settings. I tried deleting all the derived data. I tried Xcode 26.0.1 and 26.1 beta 2.

In macOS 13.2, the NSTrackingEnabledDuringMouseDrag flag for NSTrackingArea is broken, i.e., mouse-entered and mouse-exited events are not sent during a drag. This problem did not exist in macOS 12. I've filed a bug report, FB11973492, just wondering if anyone knows a workaround.

When I pass a file path url of a file in iCloud Drive to -[NSWorkspace openURLs:withApplicationAtURL:configuration:completionHandler:], it fails. There is no exception, and the completion handler isn't called. This is in a sandboxed app on macOS 26.1. NSWorkspaceOpenConfiguration* config = NSWorkspaceOpenConfiguration.configuration; config.activates = YES; config.promptsUserIfNeeded = YES; NSLog(@"performDrag 2 with %@", filePathObs); [NSWorkspace.sharedWorkspace openURLs: filePathObs withApplicationAtURL: appURL configuration: config completionHandler: ^(NSRunningApplication * _Nullable app, NSError * _Nullable error) { NSLog(@"performDrag 3"); if (error != nil) { NSLog(@"%@\n%@", error, filePathObs); } NSLog(@"complete performDrag"); }]; NSLog(@"performDrag 4"); In the debug log, the performDrag 2 and performDrag 4 messages appear. I also looked in the Console log, but the only messages that mention my app don't mean anything to me. AFIsDeviceGreymatterEligible Missing entitlements for os_eligibility lookup 6c Reentrant message: kDragIPCCompleted, current message: kDragIPCLeaveApplication

Running Tahoe 26.1 in a virtual machine, I can't sign into my Apple account. There is an error message saying "Could not communicate with the server." Internet access otherwise seems to be working in the VM. I tried both UTM and VirtualBuddy. Is this supposed to work?

In trying to convert some Objective-C to Swift, I have a subclass of NSWindowController and want to write a convenience initializer. The documentation says You can also implement an NSWindowController subclass to avoid requiring client code to get the corresponding nib’s filename and pass it to init(windowNibName:) or init(windowNibName:owner:) when instantiating the window controller. The best way to do this is to override windowNibName to return the nib’s filename and instantiate the window controller by passing nil to init(window:). My attempt to do that looks like this: class EdgeTab: NSWindowController { override var windowNibName: NSNib.Name? { "EdgeTab" } required init?(coder: NSCoder) { super.init(coder: coder) } convenience init() { self.init( window: nil ) } } But I'm getting an error message saying "Incorrect argument label in call (have 'window:', expected 'coder:')". Why the heck is the compiler trying to use init(coder:) instead of init(window:)?

I made a new app icon with Icon Composer, and added it to my Xcode project. In the built app, I see AppIcon.icon next to the old AppIcon.icns. But Tahoe is not showing the new icon. Is this because Tahoe has cached the old icon somewhere, and if so, is there some way to make it refresh?

The documentation of the NSPopover property hasFullSizeContent says that when it's true, you should Use the safeAreaLayoutGuide of the contentViewController view to ensure that your content is fully visible and doesn’t become clipped when displayed. I can do that by adding auto-layout constraints programmatically, but is there a way to do it in the xib? When I googled it, the AI summary begins To use safe areas in a Mac XIB (Interface Builder), enable the "Use Safe Area Layout Guides" checkbox in the File Inspector for your view but I have not found any non-AI indications that such a checkbox exists for macOS. (I'm using Xcode 26.2.)

I want to print the content of a WKWebView. I've done some searching, and many people have struggled with this over the years. Some claimed success, but their solutions don't work for me. One person created images for each pages and printed that, but then if you were to print to PDF, you'd get a PDF containing images rather than text. If I just call the printView(_:)) method of the view, I get blank pages. With the following more elaborate code, I get a partial printout, 11 out of what should be about 13 pages. let info = NSPrintInfo.shared info.topMargin = 72.0; info.bottomMargin = 72.0; info.leftMargin = 72.0; info.rightMargin = 72.0; info.isVerticallyCentered = false; info.isHorizontallyCentered = false; info.horizontalPagination = .fit; info.verticalPagination = .automatic; let printOp = webView!.printOperation( with: info ) printOp.canSpawnSeparateThread = true printOp.view?.frame = NSMakeRect( 0, 0, info.paperSize.width, info.paperSize.height ) printOp.runModal(for: webView.window!, delegate: self, didRun: nil, contextInfo: nil ) When I run the above under the debugger, I see console messages saying CGContextClipToRect: invalid context 0x0. Once the print dialog appears, if I touch (but not change) the selected printer, then the page count changes to the correct value.