updated for Apple Silicon

* Updated for macOS Ventura and Xcode 14.2
* Apple Silicon compatible
* updated project to macOS 11+
* fixed most warnings and deprecations
* replaced ShortcutRecorder Framework with MASShortcut package
* general refactoring
* updated Preferences window layout
* replaced most static images with SF Symbols
* moved remaining images to Assets catalogue
* updated icon to user submitted icon 2ndalpha#203
* refreshed status menu icon
* refreshed .hst icon
* added support for restarting mDNSResponder via NSUserAppleScriptTask
* updated .gitignore to ignore .DS_Store files
* updated README to indicate support for macOS Big Sur and above

.gitignore

@@ -1,2 +1,3 @@
 xcuserdata
 build
+.DS_Store

AboutBox.xib

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="15705" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES">
+<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="21507" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES">
     <dependencies>
         <deployment identifier="macosx"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="15705"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="21507"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <objects>
@@ -20,7 +20,7 @@
             <windowStyleMask key="styleMask" titled="YES" closable="YES"/>
             <windowPositionMask key="initialPositionMask" leftStrut="YES" rightStrut="YES" topStrut="YES" bottomStrut="YES"/>
             <rect key="contentRect" x="131" y="158" width="335" height="260"/>
-            <rect key="screenRect" x="0.0" y="0.0" width="1792" height="1097"/>
+            <rect key="screenRect" x="0.0" y="0.0" width="1470" height="919"/>
             <view key="contentView" id="2">
                 <rect key="frame" x="0.0" y="0.0" width="335" height="260"/>
                 <autoresizingMask key="autoresizingMask"/>
@@ -55,9 +55,9 @@ All rights reserved.</string>
                         </textFieldCell>
                     </textField>
                     <imageView fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="13">
-                        <rect key="frame" x="62" y="131" width="85" height="109"/>
+                        <rect key="frame" x="62" y="131" width="115" height="109"/>
                         <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
-                        <imageCell key="cell" refusesFirstResponder="YES" alignment="left" imageScaling="proportionallyDown" image="About Box Image" id="14"/>
+                        <imageCell key="cell" refusesFirstResponder="YES" alignment="left" imageScaling="proportionallyDown" image="AboutIcon" id="14"/>
                     </imageView>
                     <textField verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="15">
                         <rect key="frame" x="73" y="74" width="68" height="14"/>
@@ -89,11 +89,11 @@ All rights reserved.</string>
                     <scrollView fixedFrame="YES" borderType="none" horizontalLineScroll="10" horizontalPageScroll="10" verticalLineScroll="10" verticalPageScroll="10" hasHorizontalScroller="NO" hasVerticalScroller="NO" usesPredominantAxisScrolling="NO" translatesAutoresizingMaskIntoConstraints="NO" id="27">
                         <rect key="frame" x="140" y="92" width="119" height="15"/>
                         <autoresizingMask key="autoresizingMask"/>
-                        <clipView key="contentView" ambiguous="YES" drawsBackground="NO" copiesOnScroll="NO" id="n8d-RP-4LU">
+                        <clipView key="contentView" drawsBackground="NO" copiesOnScroll="NO" id="n8d-RP-4LU">
                             <rect key="frame" x="0.0" y="0.0" width="119" height="15"/>
                             <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                             <subviews>
-                                <textView ambiguous="YES" editable="NO" drawsBackground="NO" importsGraphics="NO" richText="NO" verticallyResizable="NO" id="30">
+                                <textView editable="NO" drawsBackground="NO" importsGraphics="NO" richText="NO" verticallyResizable="NO" id="30">
                                     <rect key="frame" x="0.0" y="0.0" width="119" height="15"/>
                                     <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                                     <color key="textColor" name="textColor" catalog="System" colorSpace="catalog"/>
@@ -104,7 +104,7 @@ All rights reserved.</string>
                                         <fragment content="[email protected]">
                                             <attributes>
                                                 <color key="NSColor" name="textColor" catalog="System" colorSpace="catalog"/>
-                                                <font key="NSFont" metaFont="user"/>
+                                                <font key="NSFont" usesAppearanceFont="YES"/>
                                                 <paragraphStyle key="NSParagraphStyle" alignment="natural" lineBreakMode="wordWrapping" baseWritingDirection="natural"/>
                                             </attributes>
                                         </fragment>
@@ -125,11 +125,11 @@ All rights reserved.</string>
                     <scrollView fixedFrame="YES" borderType="none" horizontalLineScroll="10" horizontalPageScroll="10" verticalLineScroll="10" verticalPageScroll="10" hasHorizontalScroller="NO" hasVerticalScroller="NO" usesPredominantAxisScrolling="NO" translatesAutoresizingMaskIntoConstraints="NO" id="32">
                         <rect key="frame" x="140" y="73" width="175" height="15"/>
                         <autoresizingMask key="autoresizingMask"/>
-                        <clipView key="contentView" ambiguous="YES" drawsBackground="NO" copiesOnScroll="NO" id="pO4-Ek-Ecy">
+                        <clipView key="contentView" drawsBackground="NO" copiesOnScroll="NO" id="pO4-Ek-Ecy">
                             <rect key="frame" x="0.0" y="0.0" width="175" height="15"/>
                             <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                             <subviews>
-                                <textView ambiguous="YES" editable="NO" drawsBackground="NO" importsGraphics="NO" richText="NO" verticallyResizable="NO" id="33">
+                                <textView editable="NO" drawsBackground="NO" importsGraphics="NO" richText="NO" verticallyResizable="NO" id="33">
                                     <rect key="frame" x="0.0" y="0.0" width="175" height="15"/>
                                     <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                                     <color key="textColor" name="textColor" catalog="System" colorSpace="catalog"/>
@@ -140,7 +140,7 @@ All rights reserved.</string>
                                         <fragment content="github.com/2ndalpha/gasmask">
                                             <attributes>
                                                 <color key="NSColor" name="textColor" catalog="System" colorSpace="catalog"/>
-                                                <font key="NSFont" metaFont="user"/>
+                                                <font key="NSFont" usesAppearanceFont="YES"/>
                                                 <paragraphStyle key="NSParagraphStyle" alignment="natural" lineBreakMode="wordWrapping" baseWritingDirection="natural"/>
                                             </attributes>
                                         </fragment>
@@ -167,6 +167,6 @@ All rights reserved.</string>
         </window>
     </objects>
     <resources>
-        <image name="About Box Image" width="256" height="256"/>
+        <image name="AboutIcon" width="128" height="128"/>
     </resources>
 </document>

Assets.xcassets/AboutIcon.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "filename" : "icon_128x128.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "[email protected]",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "icon_512x512.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,68 @@
+{
+  "images" : [
+    {
+      "filename" : "icon_16x16.png",
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "16x16"
+    },
+    {
+      "filename" : "[email protected]",
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "16x16"
+    },
+    {
+      "filename" : "icon_32x32.png",
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "32x32"
+    },
+    {
+      "filename" : "[email protected]",
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "32x32"
+    },
+    {
+      "filename" : "icon_128x128.png",
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "128x128"
+    },
+    {
+      "filename" : "[email protected]",
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "128x128"
+    },
+    {
+      "filename" : "icon_256x256.png",
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "256x256"
+    },
+    {
+      "filename" : "[email protected]",
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "256x256"
+    },
+    {
+      "filename" : "icon_512x512.png",
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "512x512"
+    },
+    {
+      "filename" : "[email protected]",
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "512x512"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Assets.xcassets/Combined Hosts Hint.imageset/Contents.json

@@ -0,0 +1,12 @@
+{
+  "images" : [
+    {
+      "filename" : "Combined Hosts Hint.png",
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Assets.xcassets/Contents.json

@@ -1,6 +1,6 @@
 {
   "info" : {
-    "version" : 1,
-    "author" : "xcode"
+    "author" : "xcode",
+    "version" : 1
   }
-}
+}