macos - Cocoa button opens a System Preference page

Question

In a OSX Cocoa app, I would like a button that would open the "speech" preference pane. Is that possible? I'm just trying to save them the time to go System Preferences > Speech > Text to Speech

Answer 1

One can even select specific sub item inside a pref pane. Here is example to select Camera under Privacy pane:

NSURL *URL = [NSURL URLWithString:@"x-apple.systempreferences:com.apple.preference.security?Privacy_Camera"];
[[NSWorkspace sharedWorkspace] openURL:URL];

Some credit goes to following site: https://macosxautomation.com/system-prefs-links.html

List of URLs for reference (*updated for macOS Big Sur & Catalina & Mojave):

Accessibility Preference Pane
Main    x-apple.systempreferences:com.apple.preference.universalaccess
Display x-apple.systempreferences:com.apple.preference.universalaccess?Seeing_Display
Zoom    x-apple.systempreferences:com.apple.preference.universalaccess?Seeing_Zoom
VoiceOver   x-apple.systempreferences:com.apple.preference.universalaccess?Seeing_VoiceOver
Descriptions    x-apple.systempreferences:com.apple.preference.universalaccess?Media_Descriptions
Captions    x-apple.systempreferences:com.apple.preference.universalaccess?Captioning
Audio   x-apple.systempreferences:com.apple.preference.universalaccess?Hearing
Keyboard    x-apple.systempreferences:com.apple.preference.universalaccess?Keyboard
Mouse & Trackpad    x-apple.systempreferences:com.apple.preference.universalaccess?Mouse
Switch Control  x-apple.systempreferences:com.apple.preference.universalaccess?Switch
Dictation   x-apple.systempreferences:com.apple.preference.universalaccess?SpeakableItems

Security & Privacy Preference Pane
Main    x-apple.systempreferences:com.apple.preference.security
General x-apple.systempreferences:com.apple.preference.security?General
FileVault   x-apple.systempreferences:com.apple.preference.security?FDE
Firewall    x-apple.systempreferences:com.apple.preference.security?Firewall
Advanced    x-apple.systempreferences:com.apple.preference.security?Advanced
Privacy x-apple.systempreferences:com.apple.preference.security?Privacy
Privacy-Camera x-apple.systempreferences:com.apple.preference.security?Privacy_Camera
Privacy-Microphone  x-apple.systempreferences:com.apple.preference.security?Privacy_Microphone
Privacy-Automation  x-apple.systempreferences:com.apple.preference.security?Privacy_Automation
Privacy-AllFiles    x-apple.systempreferences:com.apple.preference.security?Privacy_AllFiles
Privacy-Accessibility   x-apple.systempreferences:com.apple.preference.security?Privacy_Accessibility
Privacy-Assistive   x-apple.systempreferences:com.apple.preference.security?Privacy_Assistive
Privacy-Location Services   x-apple.systempreferences:com.apple.preference.security?Privacy_LocationServices
Privacy-SystemServices  x-apple.systempreferences:com.apple.preference.security?Privacy_SystemServices
Privacy-Advertising x-apple.systempreferences:com.apple.preference.security?Privacy_Advertising
Privacy-Contacts    x-apple.systempreferences:com.apple.preference.security?Privacy_Contacts
Privacy-Diagnostics & Usage x-apple.systempreferences:com.apple.preference.security?Privacy_Diagnostics
Privacy-Calendars   x-apple.systempreferences:com.apple.preference.security?Privacy_Calendars
Privacy-Reminders   x-apple.systempreferences:com.apple.preference.security?Privacy_Reminders
Privacy-Facebook    x-apple.systempreferences:com.apple.preference.security?Privacy_Facebook
Privacy-LinkedIn    x-apple.systempreferences:com.apple.preference.security?Privacy_LinkedIn
Privacy-Twitter x-apple.systempreferences:com.apple.preference.security?Privacy_Twitter
Privacy-Weibo   x-apple.systempreferences:com.apple.preference.security?Privacy_Weibo
Privacy-Tencent Weibo   x-apple.systempreferences:com.apple.preference.security?Privacy_TencentWeibo

macOS Catalina 10.15:
Privacy-ScreenCapture   x-apple.systempreferences:com.apple.preference.security?Privacy_ScreenCapture
Privacy-DevTools    x-apple.systempreferences:com.apple.preference.security?Privacy_DevTools
Privacy-InputMonitoring x-apple.systempreferences:com.apple.preference.security?Privacy_ListenEvent
Privacy-DesktopFolder   x-apple.systempreferences:com.apple.preference.security?Privacy_DesktopFolder
Privacy-DocumentsFolder x-apple.systempreferences:com.apple.preference.security?Privacy_DocumentsFolder
Privacy-DownloadsFolder x-apple.systempreferences:com.apple.preference.security?Privacy_DownloadsFolder
Privacy-NetworkVolume   x-apple.systempreferences:com.apple.preference.security?Privacy_NetworkVolume
Privacy-RemovableVolume x-apple.systempreferences:com.apple.preference.security?Privacy_RemovableVolume
Privacy-SpeechRecognition   x-apple.systempreferences:com.apple.preference.security?Privacy_SpeechRecognition
Privacy-DevTools    x-apple.systempreferences:com.apple.preference.security?Privacy_DevTools

macOS Big Sur 10.11/10.16:
Privacy-Bluetooth   x-apple.systempreferences:com.apple.preference.security?Privacy_Bluetooth
Privacy-Music   x-apple.systempreferences:com.apple.preference.security?Privacy_Media
Privacy-Home    x-apple.systempreferences:com.apple.preference.security?Privacy_HomeKit


Dictation & Speech Preference Pane
Dictation   x-apple.systempreferences:com.apple.preference.speech?Dictation
Text to Speech  x-apple.systempreferences:com.apple.preference.speech?TTS
Sharing Preference Pane
Main    x-apple.systempreferences:com.apple.preferences.sharing
Screen Sharing  x-apple.systempreferences:com.apple.preferences.sharing?Services_ScreenSharing
File Sharing    x-apple.systempreferences:com.apple.preferences.sharing?Services_PersonalFileSharing
Printer Sharing x-apple.systempreferences:com.apple.preferences.sharing?Services_PrinterSharing
Remote Login    x-apple.systempreferences:com.apple.preferences.sharing?Services_RemoteLogin
Remote Management   x-apple.systempreferences:com.apple.preferences.sharing?Services_ARDService
Remote Apple Events x-apple.systempreferences:com.apple.preferences.sharing?Services_RemoteAppleEvent
Internet Sharing    x-apple.systempreferences:com.apple.preferences.sharing?Internet
Bluetooth Sharing   x-apple.systempreferences:com.apple.preferences.sharing?Services_BluetoothSharing

Software update x-apple.systempreferences:com.apple.preferences.softwareupdate?client=softwareupdateapp

All this is possible thanks to key in Info.plist in preferencePane + CFBundleURLTypes (CFBundleURLSchemes) x-apple.systempreferences (Info.plist) in System Preferences.app

NSPrefPaneAllowsXAppleSystemPreferencesURLScheme

As of 10.15 some of the keys are located in PrivacyTCCServices.plist (Security.prefPane)

As of 10.14 Mojave some Privacy keys ceased to exists. Mojave privacy list:

Catalina privacy list: