feat: partial support for Mac Silicon (#414)

* add target architecture for apple plugin build
* update mac bundle. Contains both x64 and arm64 target
* update mac bundle meta info
* disable showing preview images on Mac Silicon, due to editor crashes. The fix will be committed later.

Author: sindharta

Editor/Scripts/Preview/PreviewUtility.cs

@@ -5,6 +5,7 @@
 using UnityEngine;
 using UnityEditor;
 using UnityEngine.Assertions;
+using System.Runtime.InteropServices;
 
 
 namespace Unity.StreamingImageSequence.Editor {
@@ -118,8 +119,12 @@ static double FindFrameXPos(double frameTime, double visibleLocalStartTime, doub
 
 //----------------------------------------------------------------------------------------------------------------------
 
-    internal static void DrawPreviewImage(ref PreviewDrawInfo drawInfo, string imagePath) 
-    {
+    internal static void DrawPreviewImage(ref PreviewDrawInfo drawInfo, string imagePath) {
+#if UNITY_EDITOR_OSX
+        //[TODO-sin: 2022-4-4] Disabling. There is a bug in Mac Silicon which causes crash when resizing images
+        if (IsUsingOSX_Silicon())
+            return;
+#endif        
         if (!File.Exists(imagePath))
             return;
 
@@ -155,9 +160,17 @@ internal static void DrawPreviewImage(ref PreviewDrawInfo drawInfo, string image
         } else {                    
             Graphics.DrawTexture(drawInfo.DrawRect, tex);
         }
-        
     }
-    
+
+#if UNITY_EDITOR_OSX
+    static bool IsUsingOSX_Silicon() {
+#if UNITY_2021_2_OR_NEWER
+        return (Architecture.Arm64 == RuntimeInformation.ProcessArchitecture);
+#else
+        return false;
+#endif
+    }    
+#endif
 //----------------------------------------------------------------------------------------------------------------------
     static Material GetOrCreateLinearToGammaMaterial() {
         if (null != m_linearToGammaMaterial)

Plugins~/CMakeLists.txt

@@ -3,6 +3,7 @@ CMAKE_MINIMUM_REQUIRED(VERSION 3.13)
 # Mac deployment target
 if(APPLE)
     set(CMAKE_OSX_DEPLOYMENT_TARGET "10.12" CACHE STRING "Minimum OS X deployment version")
+    set(CMAKE_OSX_ARCHITECTURES "arm64;x86_64" CACHE STRING "Target Architecture" FORCE)
 endif()
 
 PROJECT(StreamingImageSequencePlugin)

Runtime/Plugins/OSX/StreamingImageSequence.bundle.meta

@@ -3,7 +3,7 @@
 <plist version="1.0">
 <dict>
 	<key>BuildMachineOSBuild</key>
-	<string>18G6032</string>
+	<string>21E258</string>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>English</string>
 	<key>CFBundleExecutable</key>
@@ -20,24 +20,24 @@
 	<array>
 		<string>MacOSX</string>
 	</array>
-	<key>CFBundleVersion</key>
-	<string></string>
 	<key>CSResourcesFileMapped</key>
 	<true/>
 	<key>DTCompiler</key>
 	<string>com.apple.compilers.llvm.clang.1_0</string>
 	<key>DTPlatformBuild</key>
-	<string>11C504</string>
+	<string>13E113</string>
+	<key>DTPlatformName</key>
+	<string>macosx</string>
 	<key>DTPlatformVersion</key>
-	<string>GM</string>
+	<string>12.3</string>
 	<key>DTSDKBuild</key>
-	<string>19B90</string>
+	<string>21E226</string>
 	<key>DTSDKName</key>
-	<string>macosx10.15</string>
+	<string>macosx12.3</string>
 	<key>DTXcode</key>
-	<string>1131</string>
+	<string>1330</string>
 	<key>DTXcodeBuild</key>
-	<string>11C504</string>
+	<string>13E113</string>
 	<key>LSMinimumSystemVersion</key>
 	<string>10.12</string>
 	<key>NSHumanReadableCopyright</key>