App: Local Recorder not working on MacOS

[DennisMoschina]

On macOS, the following exception appears when trying to start the local recorder:

ERROR:flutter/runtime/dart_vm_initializer.cc(40)] Unhandled Exception: Unsupported operation: getExternalStoragePath is not supported on this platform
#0      PathProviderFoundation.getExternalStoragePath (package:path_provider_foundation/path_provider_foundation.dart:72:5)
#1      getExternalStorageDirectory (package:path_provider/path_provider.dart:154:40)
#2      _pickDirectory (package:open_wearable/widgets/sensors/local_recorder/local_recorder_view.dart:683:31)
#3      _LocalRecorderViewState.build.<anonymous closure>.<anonymous closure> (package:open_wearable/widgets/sensors/local_recorder/local_recorder_view.dart:378:59)
#4      _InkResponseState.handleTap (package:flutter/src/material/ink_well.dart:1222:21)
#5      GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:345:24)
#6      TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:758:11)
#7      BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:383:5)
#8      BaseTapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:314:7)
#9      PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:721:9)
#10     PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:97:12)
#11     PointerRouter._dispatchEventToRoutes.<anonymous closure> (package:flutter/src/gestures/pointer_router.dart:142:9)
#12     _LinkedHashMapMixin.forEach (dart:_compact_hash:765:13)
#13     PointerRouter._dispatchEventToRoutes (package:flutter/src/gestures/pointer_router.dart:140:18)
#14     PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:130:7)
#15     GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:528:19)
#16     GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:498:22)
#17     RendererBinding.dispatchEvent (package:flutter/src/rendering/binding.dart:473:11)
#18     GestureBinding._handlePointerEventImmediately (package:flutter/src/gestures/binding.dart:437:7)
#19     GestureBinding.handlePointerEvent (package:flutter/src/gestures/binding.dart:394:5)
#20     GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:341:7)
#21     GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:308:9)
#22     _invoke1 (dart:ui/hooks.dart:372:13)
#23     PlatformDispatcher._dispatchPointerDataPacket (dart:ui/platform_dispatcher.dart:467:7)
#24     _dispatchPointerDataPacket (dart:ui/hooks.dart:307:31)