11 files changed, 18 insertions, 0 deletions
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-128.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-128.png
index 7b432b1..1db583b 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-128.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-128.png
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-128@2x.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-128@2x.png
index 6802108..b4d9088 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-128@2x.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-128@2x.png
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-16.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-16.png
index bbde225..eeb0547 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-16.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-16.png
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-16@2x.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-16@2x.png
index 6d68a93..9b91e57 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-16@2x.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-16@2x.png
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-256.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-256.png
index 6802108..b4d9088 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-256.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-256.png
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-256@2x.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-256@2x.png
index 6f1d2cc..b793618 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-256@2x.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-256@2x.png
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-32.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-32.png
index 6d68a93..9b91e57 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-32.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-32.png
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-32@2x.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-32@2x.png
index 5248646..44c0196 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-32@2x.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-32@2x.png
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-512.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-512.png
index 6f1d2cc..b793618 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-512.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-512.png
diff --git a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-512@2x.png b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-512@2x.png
index 2ceaf28..3a32e2c 100644
--- a/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-512@2x.png
+++ b/SpriteEd/Assets.xcassets/AppIcon.appiconset/AppIcon-512@2x.png
diff --git a/SpriteEd/Util.cs b/SpriteEd/Util.cs
index 4bba750..cca9c47 100644
--- a/SpriteEd/Util.cs
+++ b/SpriteEd/Util.cs
@@ -16,6 +16,7 @@
 //
 using System;
 using System.IO;
+using AppKit;
 
 namespace SpriteEd
 {
@@ -76,5 +77,22 @@ namespace SpriteEd
         {
             return s.ReadByte() == 255;
         }
+
+        /// <summary>
+        /// Display an error alert.
+        /// </summary>
+        /// <param name="title">The title for the alert.</param>
+        /// <param name="message">The message for the alert.</param>
+        public static void DisplayAlert(string title, string message)
+        {
+            NSAlert alert = new NSAlert()
+            {
+                AlertStyle = NSAlertStyle.Critical,
+                InformativeText = message,
+                MessageText = title
+            };
+
+            alert.RunModal();
+        }
     }
 }