In the archived documentation for Distribution Definition files (https://developer.apple.com/library/archive/documentation/DeveloperTools/Reference/DistributionDefinitionRef/Chapters/Distribution_XML_Ref.html), the allowed-os-versions and os-version element are partially documented. I have a few questions about these elements: allowed-os-versions The documentation states: Availability: Available in OS X v10.6.6 and later. Has this element always worked correctly in the past? I'm asking because it does not seem to work correctly on OS X v10.14 for the min attribute of a sub os-version element. os-version The documentation states: This element is designed for you to use a specific OS version number for the min attribute, and a major OS version number for the before attribute. The expectation is that you will know an exact minimum version but not an exact major version. This keeps you from having to guess the last minor revision before the next major revision, as you would have to do if the before attribute were inclusive. This is quite confusing because the documentation never explicitly says what a specific or major OS version number is. Is specific major.minor.patch or major.minor? What is major? major or major.minor? As the documentation was created at a time where the OS version scheme was: 10.minor.patch (and minor was actually the major) and we are now in an era where the OS version is major.minor.path, this is even more confusing. I would also be curious to know what the major version is officially supposed to be for macOS Tahoe in this case. 16 or 26? Generally speaking, this documentation is missing examples for a lot of the elements. Also why is there a tag for InstallerJS and not one for Installation in the Developer Forums?

Q. Is there a plan to finally document the PackageInfo file format used in .pkg flat package? The man page for pkgbuild is not really useful to understand the different options. It does not seem to make sense to have an official documentation for the Distribution Definition file but not for the PackageInfo file.

I haven't been looking at screensavers for a long time because of Apple's lack of will (or resources?) to provide a public version of the private modern SDK used by Apple for a very long time now. I'm now looking at the Screen Saver pane in System Settings (the What-If version of System Preferences in an alternate universe where all screens are in portrait mode). In macOS Sequoia, it seems like 3rd party screensavers are not welcome considering that they are relegated to the "Other" section at the bottom of the list and you have to click Show All to start seeing 3rd party screen savers. I also had a quick look at macOS Tahoe Beta 3 and it looks like that all the real screensavers are gone (3rd party and the ones from Apple: Hello, Message, Flurry, etc.) or at least it requires to be a Nobel Prize to find them (and the Search field is not useful). I tried to install a 3rd party screen saver on macOS Tahoe Beta 3, it doesn't show up in the list. To summarize: No public access to modern APIs AFAIK. UI that is hostile to 3rd party screen savers on macOS Sequoia. Apparently only screensavers that are slideshows or movies curated by Apple in macOS Tahoe b3. Hence the question: Is there any future for screen savers on macOS? Because if there's none, I won't waste my time trying to update some old screen savers.

In some crashlog files, there are additional pieces of information related to codesigning. I can understand what most of themcorresponds to (ID, TeamID, Flags, Validation Category). But there is one I have some doubt about: Trust Level. As far as I can tell (or at least what Google and other search engines say), this is an unsigned 32 bit integer that defines the trust level with -1 being untrusted, 0, being basically an Apple executable and other potential bigger values corresponding to App Store binaries, Developer ID signature, etc. Yet, I'm not able to find a corresponding detailed documentation about this on Apple's developer website. I also had a look at the LightweightCodeRequirements "include" file and there does not seem to be such a field available. [Q] Is there any official documentation listing the different values for this trust level value and providing a clear description of what it corresponds to?

Let's say I have a NSTextView embedded in a NSClipView and NSScrollView. Let's say that the application using this NSTextView is run in a right-to-left (RTL) language. Let's say that because the text visible in the text view will always be LTR, the text view alignment is forced to left instead of the default natural setting and that this text is big enough to require a vertical and horizontal scrollers. What I'm experiencing so far is that AppKit will scroll the NSTextView to the top right corner. Which would make sense if the contents of the textview was RTL. But it is not. I looked at the documentation, headers, tried playing with a subclass of NSScrollView and play with the tile method, with the userInterfaceLayoutDirection property of the scrollview. No success so far. [Q] How do you tell NSScrollView or NSTextView that the default scroll position is the top left corner and not the top right corner in such a case? Environment: macOS 10.14.6 ; AppKit ; Objective-C (if that matters)

[Q] How is it possible to order the %@ parameters correctly when using both LeftToRight text and RightToLeft text in the same string? Context: this needs to work for the title of a NSMenuItem. In English, I have the following format string: @"%@ - %@" and I use the following code: NSString *myString = [NSString stringWithFormat:@"%@ - %@", @"LTR Text", @"LTR Other Text"]; Which results in @"LTR Text - LTR Other Text". In a RightToLeft language, the @"LTR Other Text" string is going to be a "RTL Other Text". And I would like the result to be: @"RTL Other Text - LTR Text" I tried playing with 1$ and 2$, it did not work. @"%2$@ - %1$@" results in @"LTR Text - RTL Other Text". I tried using stringByAppendingString: or Format: to force the ordering. It does not work. The "LTR Text" string ends up in the middle of "RTL Other Text". I tried using the ^0 or 0^ keywords apparently used by the Finder. But this is not supported by the standard Cocoa API. This is on macOS 10.14.6 where support for RTL text is not good in Xcode v10.1 text editors when it comes to text selection, copy-paste, and typing.

I have a NSRulerView with a vertical orientation. It works fine from macOS 10.13 to 11.x. In macOS Monterey (12.2.1 here), the ruler view is not receiving drawHashMarksAndLabelsInRect: messages when the associated NSTextView is scrolled vertically. When the parent NSScrollView is resized, the ruler view is correctly refreshed on all macOS versions. [Q] Is it a known bug in macOS Monterey?

3 questions on the AppleArchive.h APIs: Are there Obj-C APIs? I see Swift APIs but I'm not looking forward to using them. Is there sample code showing how to use the C APIs? Is there any plan to fix the documentation on Apple Developer web page for this library? It's not really useful right now and the CSS is broken for sample code (the sample code frame is clipping code on the right). Same problem with the Compression documentation.

Optimal height = height that displays all the rows such that you can't scroll the tableview vertically (assuming elasticity is set to none). On macOS Catalina and earlier, the optimal height for a headerless NSTableView is: number of rows * (height of row + height of intercell spacing) On macOS Big Sur and later, it looks like to be: number of rows * (height of row + height of intercell spacing) + 20 [Q] Why do we have to add an apparently pointless 20-pixel high white space at the bottom of the NSTableView in macOS Big Sur and later? This is rather annoying and breaks controls/views spacing.

Please note I have already seen the answers pointing to the audit_token. From what I'm observing, the audit_token does not return the pid from a NEFilterFlow but actually returns the epid. For instance, if Safari is sending a HTTP GET request and the server name of the URL needs to be resolved, mDNSResponder will resolve the URL on behalf of Safari. In this case, the debug info for the NEFilterFlow shows that: the procPID for the flow representing the UDP communication to port 53 is the one of mDNSResponder. the eprocPID for this flow is the one of Safari. If you use the audit_token of the sourceApp, you will end up with the eprocPID: the Safari one. Which makes sense since it's the audit_token for the sourceApp. But, IMO, it's not the pid of the network flow. There is obviously a non official API to retrieve the eprocPID value since Objective-C is the nice language that lets you retrieve that kind of info easily. The issue is that this is quite probably not considered as safe/secure as the way you get the eprocPID through the audit_token. So: [Q] How are we supposed to get the real pid from a NEFilterFlow?

The new .ips format does not seem to provide a way to know whether a binary is part of macOS. Ref. https://developer.apple.com/documentation/xcode/examining-the-fields-in-a-crash-report [Q] Is it really the case? If it's not part of the information inside a .ips file, how is it supposed to be determine now? loadAddress ranges? Just asking for a friend.

Let's say you have a NSTextField label. Let's say you have attached a formatter to the NSTextField. Let's say the formatter may not return the same string for the same object depending on the time of the day. [Q] How do you force the refresh the string displayed by the NSTextField when you provide the same object value over time? So far, I've only found an ugly solution: call setNeedsDisplay:YES when I set the object value. I'm looking for a more elegant solution. An example illustrating the "issue". The MainMenu.xib file contains a NSWindow with a NSTextField. When the [_label setNeedsDisplay:YES]; line is uncommented, the displayed NSTextField string is refreshed every 5 seconds as expected. Otherwise, it's not. #import "AppDelegate.h" @interface MyFormatter : NSFormatter @property NSUInteger counter; @end @implementation MyFormatter - (nullable NSString *)editingStringForObjectValue:(id)inObject {     if (inObject==nil)         return @"";     if ([inObject isKindOfClass:NSString.class])         return inObject;     if ([inObject isKindOfClass:NSAttributedString.class]==YES)         return ((NSAttributedString *)inObject).string;     return @""; } - (NSString *)stringForObjectValue:(id)inObject {     if (inObject==nil)         return @"";     return [NSString stringWithFormat:@"%lu",(unsigned long)self.counter]; } #pragma mark - - (BOOL)getObjectValue:(id *) outObject forString:(NSString *) inString errorDescription:(out NSString **) outError {     *outObject=[inString copy];     return YES; } @end @interface AppDelegate () {     IBOutlet NSTextField * _label;     MyFormatter * _formatter;     NSTimer * _timer; } - (void)updateFormatter:(NSTimer *)inTimer; @end @implementation AppDelegate - (void)applicationDidFinishLaunching:(NSNotification *)aNotification {     _formatter=[MyFormatter new];     _label.formatter=_formatter;     _label.objectValue=@"objectValue";     _timer=[NSTimer scheduledTimerWithTimeInterval:5                                             target:self                                       selector:@selector(updateFormatter:)                                           userInfo:nil                                            repeats:YES]; } - (void)updateFormatter:(NSTimer *)inTimer; {     _formatter.counter++;     _label.objectValue=@"objectValue";     //[_label setNeedsDisplay:YES]; } @end