Explore best practices for creating inclusive apps for users of Apple accessibility features and users from diverse backgrounds.

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Using WebSocket for BCI Click Input in VisionOS - FocusState vs. System-Level Limitations
Hi everyone, My team and I are developing an accessibility-focused VisionOS app (MindTap) as part of a university project, aiming to support individuals with Locked-In Syndrome using Brain-Computer Interface (BCI) signals to trigger interactions (e.g., tapping) within the Apple Vision Pro environment. Problem 1: Simulating Eye Tracking in Simulator We are testing onHover with Send pointer to the device under I/O > Input in the simulator, and while it mostly works (a bit laggy), we found that onHover won't function on the actual Vision Pro hardware. From what I understand, we should be using FocusState for proper gaze interaction, but testing this requires the physical device. Is there any workaround or official Apple-recommended way to simulate Focus-based gaze detection without a real Vision Pro? Problem 2: WebSocket-triggered "Click" doesn't work outside the app We successfully use WebSocket to send a custom signal (a "1" from the brain signal device) to trigger an action inside our app. However, when the user opens a third-party app like Apple News, the WebSocket-triggered "click" no longer works. We suspect this is due to sandbox restrictions or lack of system-level permissions. Is it possible in anyway to: Trigger interaction events outside the app using custom input (like BCI via Websocket)? Access system-wide click/tap simulation APIs from within VisionOS apps Integrate this with accessibility services (like Voice Control or AssistiveTouch) We'd appreciate any official guidance or tips from others building similar accessibility apps with alternative input methods in VisionOS. Thanks in advance for any insight you can provide!
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212
Apr ’25
Programmatically Modifying Per Application or System Wide Color Filters using Cocoa/Swift in MacOS?
I'm looking into how to programmatically control color filters in the Accessibility settings under "System Settings" -> "Accessibility" -> "Color Filters"--in particular the "Intensity" and "Filter type" settings. As far as I have gathered, changing this setting can only be accomplished using the CoreGraphics APIs or Accessibility APIs (I've poked around GitHub, Stack Overflow, and queried some LLMs), but there doesn't seem to be a clear cut example for doing this using public facing APIs, without ripping off source code from another project wholesale or using private APIs. My goal is to overlay a color filter at either a per-application or system level to help with accessibility. If there's a way to overlay this capability on an application-by-application basis as a third-party developer, that would be the most ideal scenario. For example, modifying the look and feel/UX for Launchpad, Photos, etc, as a third-party developer without accessing the source code of the application that I'm modifying the look/feel for (with appropriate user consent of course).
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390
Jul ’25
Seeking API Support for Marking Substrings as Headings in NSTextView for VoiceOver
I'm developing a document editor for macOS using AppKit, which supports structured content such as titles and multiple heading levels—similar to what you see in the Pages app. I'm looking for a way to programmatically mark a specific substring within an NSTextView as a heading, so that VoiceOver can recognize it and announce it appropriately (e.g., by saying “heading” before reading the text). This would be similar in spirit to how NSAccessibilityLinkTextAttribute works for links. Is there an existing accessibility text attribute or recommended approach to achieve this behavior for headings? If not, I’d appreciate any guidance or suggestions on how best to implement this in a VoiceOver-friendly way. Thank you in advance for your help! Best regards,
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113
May ’25
SwiftUI Full keyboard access doesn't navigate through every button on screen
I have screen in my app that can represented by following layout, I would like this screen to be possible to navigate with full keyboard access but there is unexpected behavior: Path: Tap "Tab" on keyboard -> whole scrollview is targeted and inside the first button1 is selected. Arrow down -> selection changes to button3 Arrow up -> selection changes back to button1 So button2 is always skipped, there is no way to navigate to it by arrows left/right. Using Tab+F and searching "button2", button2 is correctly selected, so it's selectable but for some reason not findable by going through elements. Putting empty text in Text views cause buttons to be vertically aligned and then everything works correctly but it is not an option. public struct BugReportView: View { public var body: some View { ScrollView { VStack(spacing: .zero) { Button("button1", action: { }) HStack { Text("some text") Text("some text2") Button("button2", action: { }) } Button("button3", action: { }) } } } }
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258
May ’25
iOS: How to maintain good app icon contrast in grayscale mode?
I’m developing an iOS app, and I’ve noticed that when the user enables Accessibility → Display & Text Size → Color Filters → Grayscale, my app icon loses a lot of visual contrast. The original colored version looks fine, but in grayscale it appears “flat” and harder to distinguish, unlike a pure black-and-white design. What I want to achieve: Ensure the app icon remains visually clear and high-contrast even when iOS renders it in grayscale. Ideally, provide an alternate “high-contrast” app icon version when grayscale mode is enabled. What I’ve tried: Increased color contrast in the original icon design. Added outlines and stronger shapes. Tested with grayscale filters in design tools. Researched Asset Catalog and alternate icons, but found no documented API to detect or respond to grayscale mode. Questions: Is there any API in iOS that allows detecting when the system is in grayscale mode so that I can programmatically switch to an alternate app icon? If not, are there Apple-recommended best practices for designing app icons that still look clear in grayscale? Are there any accessibility guidelines specifically addressing icon design for grayscale or color-blind modes? Additional info: iOS version tested: iOS 17.5 Development in Swift + SwiftUI, using Asset Catalog for icons. I am aware that iOS supports alternate icons via setAlternateIconName, but I haven’t found a trigger for grayscale mode.
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460
Aug ’25
CallKit連携でError 4099が頻発し、NEAppPushDelegateの通知が取得できず着信画面が表示されない問題について
iOSアプリでNEAppPushSessionを使い、NEAppPushDelegateの通知を受けてCallKitの着信画面を表示する実装をしていますが、以下の問題に直面しています。 8/13 ログにて下記のエラーが頻発しました。 通知の受け取りテストを約120回してその間ずっとこのエラーが出ていました。 エラー 2025-08-14 11:27:06.793073 +0900 nesessionmanager NESMAppPushSession[SimplePushDefaultConfiguration:7B7218F3-94B5-4AE5-9B9E-94E176694D02] failed to report incoming call to CallKit, error: Error Domain=NSCocoaErrorDomain Code=4099 "The connection to service named com.apple.callkit.networkextension.messagecontrollerhost was invalidated from this process." UserInfo={NSDebugDescription=The connection to service named com.apple.callkit.networkextension.messagecontrollerhost was invalidated from this process.} このエラーログが頻発した後、callkitの通知画面が表示されなくなりました。 ですがどうやら通知の監視は開始しているようです。 15時間後の8/14 時間をあけたからか、再度通知が来るようになりました。 ですが再度通知の受け取りテストを行った時に同じエラーログが出ました。 再度通知テストを約120回程行ったら、このエラーログが頻発した後、callkitの通知画面が表示されなくなりました。 ですがどうやら今回も通知の監視は開始しているようです。 15時間後の8/15 今日は15時間かけても通知を取得できませんでした。 ですが同じく通知の監視は開始していそうです。 iPhoneの再起動、Xcodeのクリーンアップ、アンインストールして再インストールなどしても通知は来ないままでした。 また、不思議なことに通知が来ない事象が起きた端末以外でも同じように通知を取得することができません。 他の通知は受け取ることができますが独自の通知であるNEAppPushManagerだけ通知を取得することができません。 質問です。 再度通知を出すためには何をすれば良いでしょうか。 この事象は4099エラーを出しすぎたことにより発生する障害なのでしょうか。 4099エラーを出ている原因は何でしょうか。
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491
Aug ’25
Attaching procedural audio to an ARKit SCNNode
I’m developing an ARKit application where I aim to attach procedurally generated audio to detected planes in the environment. While using a static audio file with SCNAudioSource and SCNAudioPlayer works as expected, integrating procedural audio via AVAudioSourceNode does not produce any sound, nor does it generate any error messages: Stack Overflow Post Working Implementation with Static Audio File: let audioPlayer = SCNAudioPlayer(source: audioSource) node.addAudioPlayer(audioPlayer) Attempted Implementation with Procedural Audio: // Audio generation code } let audioPlayer = SCNAudioPlayer(avAudioNode: audioNode) node.addAudioPlayer(audioPlayer) In this setup, the AVAudioSourceNode successfully generates audio when connected directly to an AVAudioEngine. However, when used with SCNAudioPlayer and attached to an SCNNode, it fails to produce sound. What doesn’t work is creating some procedural audio with an AVAudioNode, as documented here: Apple docs Additionally, I explored the WWDC18 AR game project, SwiftShot, which utilizes SCNAudioPlayer(avAudioNode:). After updating it for the latest Xcode, the graphics function correctly, but the audio does not play. I also noted that the Apple documentation mentions an audioPlayerWithAVAudioNode: method, stating: Using this initializer is typically not necessary. Instead, call the audioPlayerWithAVAudioNode: method, which returns a cached audio player object if one for the specified AVAudioNode object has already been created and is available for use. However, this method does not appear to be available in Swift. Any insights or guidance on this matter would be greatly appreciated.
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229
Apr ’25
ApplePay Merchant Session - Could not create SSL/TLS secure channel issue
As part of apple pay implementation we are trying to create a merchant session by trying to connect to apple endpoint https://apple-pay-gateway-cert.apple.com/paymentservices/startSession. While trying to do so we are facing an error “An error occurred while sending the request. The request was aborted: Could not create SSL/TLS secure channel.” . I call the validation url by passing to a C# .Net Framework 4.8 Web API. The API setups an HttpClient with the Merchant Identity Validation Certificate found in my apple account and calls the validation url passing in the required Json Validation Object. When I call PostAsync() I get an exception with the above error message Code is working successfully on my local machine but facing this issue while deployed on Dev / Model environment for testing. We have used Azure app service for deployment and TLS version 1.2 already present here. We have used the Merchant Identity certificate that was issued and have also checked with networking and infrastructure team to make its not an issue from our side. Does anyone have any other idea what could be causing this error. Thank you, Supriya
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120
Jun ’25
Accessibility Personal Voice Issue with iOS & iPadOS Beta 1-6
Please refer to Feedback report: FB19701007 The Personal Voice file created in English changes to either Spanish or Chinese and no longer works properly. This has been happening since Beta 1 of iOS/iPadOS 26. I have been unable to pinpoint what causes this to occur. Possibly downloading foreign voices to a device or using different voices via AVSpeechSynthesizer. I run an app in Xcode on my device that prints to the console info about the installed voices. Initially after creation here is the output: Voice Identifier: com.apple.speech.personalvoice.16173F8D-DFB0-4024-98CC-69D965FD96A4 Language: en-US Then I hear a Spanish accent and find this: Voice Identifier: com.apple.speech.personalvoice.16173F8D-DFB0-4024-98CC-69D965FD96A4 Language: es-MX Currently it isn't working and here is the output: Voice Identifier: com.apple.speech.personalvoice.16173F8D-DFB0-4024-98CC-69D965FD96A4 Language: zh-CN Note that the voice file on all three above is the same. No matter what the user does, the created voice file should never be able to change languages. On my test devices I reset them all by erasing all content and settings and creating a new English Personal Voice and the issue persists. A side issue is the toggle share across devices doesn't remain off if turned off. I tried to not share to see if that could be the cause, but the toggle turns on automatically. It won’t remain off.
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869
Aug ’25
Avoid trackpad gesture conflict between dragging and accessibility zooming when using three fingers
Double-tap three fingers and drag to change zoom” should suppress “Three Finger to Drag”. Currently these gestures are triggered simultaneously, for no real reasons. I saw different behaviors for different environments, but none is desired. Current and desired behavior: This seems an issue so I filed a feedback.
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792
Aug ’25
Thai input glitch after Command + Delete in macOS beta
Issue: When using the shortcut Command + Delete to clear a line of text, the next character I type in Thai unexpectedly appears as an English character, even though the input source is still set to Thai. After that, subsequent characters return to Thai as expected. Details: Affected apps: Notes, Messages, and some other native apps Not affected: Browser text fields (Safari, Chrome, etc.) Does not occur when using Option + Delete or just Delete macOS [insert beta version + build number] Mac model: [insert model] Input sources: Thai – Kedmanee, English – U.S. Steps to reproduce: Open Notes (or Messages). Switch to Thai input. Type a few Thai words. Press Command + Delete. Type again — the first character shows up in English. Expected: First character should remain in Thai, consistent with the active input source. Actual: First character shows as English, then input switches back to Thai.
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816
Aug ’25
Custom prediction panel not working in Google Docs
I’m working on a macOS Accessibility setup for a French-speaking user and I’ve hit a wall. (I'm not a developper and I'm trying to help my kid with dyslexia) I successfully built a custom word prediction panel using the Panel Editor (Keyboard) in macOS Accessibility > Keyboard > Accessibility Keyboard. Here’s what I have so far: • The prediction panel works system-wide: I can use it to type in Finder, Safari, Notes, TextEdit, and even browser search bars. • The panel appears above all applications and suggestions show up correctly. • However, it does not work inside Google Docs (tested in Chrome, Safari, and Firefox). Selecting a word from the panel does nothing in the Docs editor. I suspect this is because: • Google Docs does not use a standard macOS text input field. • Docs is a web app that relies on custom JavaScript editors, contentEditable elements, and canvas rendering, so macOS Accessibility APIs (AXTextField, AXInsertText, etc.) don’t register or inject text events. • Accessibility tools like the Accessibility Keyboard rely on native macOS text input methods, which don’t hook into Google Docs’ custom editor. Important: I’m not a programmer. I’d like to know if there is an easy fix or option in macOS, Google Chrome, or Google Docs that would make my custom prediction panel work, before going into custom development. Technical setup: • MacBook Air (M2, 2022) • RAM: 8 GB • macOS: Sequoia 15.3.1 • Language: French (system and keyboard) • Accessibility Keyboard: Enabled via Settings > Accessibility > Keyboard • Custom panel: Built using Panel Editor (Keyboard), named “Philemon Prédiction” • Browsers tested: Chrome, Safari, Firefox (same issue) • Behavior: Panel is visible, suggestions appear, but inserting text does nothing in Google Docs Has anyone worked around this limitation? Is there a simple setting, workaround, or accessibility option to bridge macOS Accessibility input with Google Docs’ editor? Thanks a lot!
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941
Aug ’25
Allow Mobile Data switching
there is no possibility to sett the allow mobile Data switch I have the latest update but still does not work and I realised it when I went to another country and I could not sett my Mobile data and when I came back still I could not.
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802
Sep ’25
Accessibility Traits for Children of a Tab Bar
Hi! I'm working on an application where I'd like VoiceOver to give each element of a tab bar the "Tab" trait. I'm testing this using the Accessibility Inspector. Essentially, I'd like to replicate the behavior of how Safari identifies each of its tabs as a "Tab" (I've attached a photo below). How exactly is this accomplished? I've tried using the .isTabBar trait to designate the child objects as "Tabs", but this doesn't seem to be working and I've struggled to find documentation about this. For additional context, these child items are Buttons, and I would like to have the .isButton trait essentially replaced by something like an .isTab trait. Not sure if this is actually possible or not, but curious how the Accessibility Inspector recognizes this in Safari.
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181
Jun ’25
AirPlay connection to a large monitor
I created a desktop app for Mac using Xojo. The app has a controller in the main window and displays advertisements and notices on a connected external display. I'm currently connecting my iMac24 to a REGZA-55M550M via AirPlay, and displaying video from the iMac to the REGZA, but the connection occasionally drops out. Yesterday, the connection dropped about 3.5 hours after connecting. Of course, I have other apps running on the iMac, but I'm not using any operations that would put a strain on the network or memory. Does AirPlay connection to non-Apple products become unstable over long periods of time?
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687
Sep ’25
Why does the macOS window sharing indicator appear for some windows but not others?
On recent versions of macOS, when a window is being shared (via the system screen-capture APIs), the OS sometimes shows a small "shared window" badge in the title bar. I’ve noticed that this indicator is not consistent: For some windows, the badge reliably appears when they are being shared. For other windows, the badge never appears, even though the window is actively shared. In particular, windows that use a standard system title bar seem to show the indicator more often, while windows with custom-drawn or non-standard chrome do not. My questions are: What are the exact conditions under which macOS decides to draw the “shared window” indicator in a window’s title bar? Is this strictly tied to certain NSWindow styles or masks (e.g. titled vs borderless)? Is there any API or flag I can use to detect programmatically whether a given window will display this system indicator when shared?
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1.2k
Sep ’25
Apple Developer Program Purchase Not Saving Progress
I’m trying to enroll in the Apple Developer Program as an individual. I’ve gone through the steps on the website and started the purchase process. However, after a couple of days when I return to the site, it doesn’t remember my progress — I have to start the enrollment from scratch every time. Is this expected behavior? Am I missing a step to save my progress or complete the enrollment properly? Any help or guidance would be appreciated. Thank you!
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165
Jun ’25
Japanese “Hattori” TTS voice missing from Settings > General > Read & Speak > Voices > Japanese on iOS 26
Japanese “Hattori” TTS voice missing from Settings > General > Read & Speak > Voices > Japanese on iOS 26 Steps: Open the path above → “Hattori” is not listed and cannot be downloaded Expected: Hattori is available to download and select Actual: Hattori is absent from the catalog Regression: Was available on iOS 18.x on the same device
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451
Sep ’25