main: disable default macos menu item

src/main/index.js

@@ -4,6 +4,7 @@ import { join, dirname } from 'path'
 import { fileURLToPath } from 'url'
 import Constants from './utils/Constants'
 import { createErrorWindow, createMainWindow } from './MainRunner'
+import Menus from './utils/Menus'
 
 let mainWindow
 let errorWindow
@@ -14,6 +15,8 @@ app.on('ready', () => {
       .replace(/\\/g, '\\\\')
   }
 
+  Menus.macOSDisableDefaultMenuItem()
+
   mainWindow = createMainWindow(mainWindow)
 })
 

src/main/utils/Menus.js

@@ -0,0 +1,11 @@
+import { systemPreferences } from 'electron'
+import Constants from './Constants'
+
+export default class Menus {
+  static macOSDisableDefaultMenuItem () {
+    if (Constants.IS_MAC) {
+      systemPreferences.setUserDefault('NSDisabledDictationMenuItem', 'boolean', true)
+      systemPreferences.setUserDefault('NSDisabledCharacterPaletteMenuItem', 'boolean', true)
+    }
+  }
+}