Added NSSpeechSynthesizer output for MacOS

.gitignore

@@ -1,3 +1,4 @@
+.*env/
 build/
 dist/'
 docs/_build

accessible_output2/outputs/__init__.py

@@ -34,6 +34,7 @@ def _load_com(*names):
 
 if platform.system() == "Darwin":
     from . import voiceover
+    from . import nsspeechsynthesizer
 
 if platform.system() == "Linux":
     from . import speech_dispatcher

accessible_output2/outputs/nsspeechsynthesizer.py

@@ -0,0 +1,28 @@
+from platform import system as get_current_system
+from .base import Output
+
+class MacSpeech(Output):
+
+    """Speech output supporting Apple MacOS NSSpeechSynthesizer."""
+
+    name = "MacSpeech"
+    priority = 101
+    system_output = True
+
+    def __init__(self, *args, **kwargs):
+        from AppKit import NSSpeechSynthesizer
+        self.synth = NSSpeechSynthesizer.alloc().init()
+
+    def speak(self, text: str, interrupt: bool = False) -> bool:
+        if interrupt:
+            self.silence()
+        return self.synth.startSpeakingString_(text)
+
+    def silence(self):
+        self.synth.stopSpeaking()
+
+    def is_active(self):
+        return get_current_system() == "Darwin"
+
+
+output_class = MacSpeech

requirements.txt

@@ -1,2 +1,3 @@
 libloader
 platform_utils
+pyobjc; sys_platform == 'darwin'