diff --git a/src/Models/DiffOption.cs b/src/Models/DiffOption.cs
index f5bec602..e122ad67 100644
--- a/src/Models/DiffOption.cs
+++ b/src/Models/DiffOption.cs
@@ -80,7 +80,7 @@ namespace SourceGit.Models
         /// <param name="change"></param>
         public DiffOption(string baseRevision, string targetRevision, Change change)
         {
-            _revisions.Add(baseRevision);
+            _revisions.Add(string.IsNullOrEmpty(baseRevision) ? "-R" : baseRevision);
             _revisions.Add(targetRevision);
             _path = change.Path;
             _orgPath = change.OriginalPath;
diff --git a/src/Models/Null.cs b/src/Models/Null.cs
new file mode 100644
index 00000000..e22ef8b3
--- /dev/null
+++ b/src/Models/Null.cs
@@ -0,0 +1,6 @@
+namespace SourceGit.Models
+{
+    public class Null
+    {
+    }
+}
diff --git a/src/SourceGit.csproj b/src/SourceGit.csproj
index 3f6aabc9..ecb55bd2 100644
--- a/src/SourceGit.csproj
+++ b/src/SourceGit.csproj
@@ -52,7 +52,7 @@
     <TrimmerRootAssembly Include="Avalonia.Themes.Fluent" />
   </ItemGroup>
   
-  <ItemGroup>
+  <ItemGroup Condition="'$(Configuration)' == 'Release'">
     <LinkerArg Include="-mmacosx-version-min=11.0" Condition="$([MSBuild]::IsOSPlatform('OSX'))"/>
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/src/ViewModels/Discard.cs b/src/ViewModels/Discard.cs
index 641c5232..f37d5f0c 100644
--- a/src/ViewModels/Discard.cs
+++ b/src/ViewModels/Discard.cs
@@ -15,7 +15,7 @@ namespace SourceGit.ViewModels
         {
             _repo = repo;
 
-            Mode = null;
+            Mode = new Models.Null();
             View = new Views.Discard { DataContext = this };
         }
 
@@ -26,7 +26,7 @@ namespace SourceGit.ViewModels
             _isUnstaged = isUnstaged;
 
             if (_changes == null)
-                Mode = null;
+                Mode = new Models.Null();
             else if (_changes.Count == 1)
                 Mode = _changes[0].Path;
             else
diff --git a/src/ViewModels/RevisionCompare.cs b/src/ViewModels/RevisionCompare.cs
index 8ac6f823..55c85129 100644
--- a/src/ViewModels/RevisionCompare.cs
+++ b/src/ViewModels/RevisionCompare.cs
@@ -71,8 +71,8 @@ namespace SourceGit.ViewModels
         public RevisionCompare(string repo, Models.Commit startPoint, Models.Commit endPoint)
         {
             _repo = repo;
-            _startPoint = startPoint;
-            _endPoint = endPoint;
+            _startPoint = (object)startPoint ?? new Models.Null();
+            _endPoint = (object)endPoint ?? new Models.Null();
 
             Task.Run(Refresh);
         }
diff --git a/src/Views/Discard.axaml b/src/Views/Discard.axaml
index 73532887..e67600d7 100644
--- a/src/Views/Discard.axaml
+++ b/src/Views/Discard.axaml
@@ -2,6 +2,7 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:m="using:SourceGit.Models"
              xmlns:vm="using:SourceGit.ViewModels"
              xmlns:c="using:SourceGit.Converters"
              mc:Ignorable="d" d:DesignWidth="500" d:DesignHeight="450"
@@ -14,19 +15,15 @@
 
     <Grid Margin="0,16,0,8" RowDefinitions="32,32" ColumnDefinitions="120,*">
       <TextBlock Grid.Row="0" Grid.Column="0" Margin="0,0,8,0" HorizontalAlignment="Right" Text="{DynamicResource Text.Discard.Changes}"/>
-      <ContentControl Grid.Row="0" Grid.Column="1">
-        <ContentControl.Content>
-          <Binding Path="Mode">
-            <Binding.TargetNullValue>
-              <StackPanel Orientation="Horizontal">
-                <Path Width="12" Height="12" Margin="0,2,0,0" Data="{StaticResource Icons.Folder.Open}"/>
-                <TextBlock Text="{DynamicResource Text.Discard.All}" Margin="4,0,0,0"/>
-              </StackPanel>
-            </Binding.TargetNullValue>
-          </Binding>
-        </ContentControl.Content>
-
+      <ContentControl Grid.Row="0" Grid.Column="1" Content="{Binding Mode}">
         <ContentControl.DataTemplates>
+          <DataTemplate DataType="m:Null">
+            <StackPanel Orientation="Horizontal">
+              <Path Width="12" Height="12" Margin="0,2,0,0" Data="{StaticResource Icons.Folder.Open}"/>
+              <TextBlock Text="{DynamicResource Text.Discard.All}" Margin="4,0,0,0"/>
+            </StackPanel>
+          </DataTemplate>
+          
           <DataTemplate DataType="x:String">
             <StackPanel Orientation="Horizontal">
               <Path Width="12" Height="12" Data="{StaticResource Icons.File}"/>
@@ -37,7 +34,7 @@
           <DataTemplate DataType="x:Int32">
             <StackPanel Orientation="Horizontal">
               <Path Width="12" Height="12" Data="{StaticResource Icons.File}"/>
-              <TextBlock Text="{Binding, Converter={x:Static c:StringConverters.FormatByResourceKey}, ConverterParameter='Discard.Total'}" Margin="4,0,0,0"/>
+              <TextBlock Text="{Binding Converter={x:Static c:StringConverters.FormatByResourceKey}, ConverterParameter='Discard.Total'}" Margin="4,0,0,0"/>
             </StackPanel>
           </DataTemplate>
         </ContentControl.DataTemplates>
diff --git a/src/Views/RevisionCompare.axaml b/src/Views/RevisionCompare.axaml
index 52bd8d9e..14ac66a7 100644
--- a/src/Views/RevisionCompare.axaml
+++ b/src/Views/RevisionCompare.axaml
@@ -11,6 +11,12 @@
              x:DataType="vm:RevisionCompare"
              Background="{DynamicResource Brush.Window}">
   <UserControl.DataTemplates>
+    <DataTemplate DataType="m:Null">
+      <Border HorizontalAlignment="Center" VerticalAlignment="Center" Background="{DynamicResource Brush.Accent}" CornerRadius="4">
+        <TextBlock Text="{DynamicResource Text.Worktree}" Classes="monospace" Margin="4,2" Foreground="#FFDDDDDD"/>
+      </Border>
+    </DataTemplate>
+    
     <DataTemplate DataType="m:Commit">
       <Grid RowDefinitions="Auto,*">
         <Grid Grid.Row="0" ColumnDefinitions="Auto,*,Auto,Auto,Auto">
@@ -33,17 +39,7 @@
     <Grid Grid.Row="0" Margin="48,0,48,4" ColumnDefinitions="*,48,*">
       <!-- Base Revision -->
       <Border Grid.Column="0" BorderBrush="{DynamicResource Brush.Border2}" BorderThickness="1" Background="{DynamicResource Brush.Contents}" CornerRadius="4" Padding="4">
-        <ContentControl>
-          <ContentControl.Content>
-            <Binding Path="StartPoint">
-              <Binding.TargetNullValue>
-                <Border HorizontalAlignment="Center" VerticalAlignment="Center" Background="{DynamicResource Brush.Accent}" CornerRadius="4">
-                  <TextBlock Text="{DynamicResource Text.Worktree}" Classes="monospace" Margin="4,2" Foreground="#FFDDDDDD"/>
-                </Border>
-              </Binding.TargetNullValue>
-            </Binding>
-          </ContentControl.Content>
-        </ContentControl>
+        <ContentControl Content="{Binding StartPoint}"/>
       </Border>
 
       <!-- Swap Button -->
@@ -53,17 +49,7 @@
 
       <!-- Right Revision -->
       <Border Grid.Column="2" BorderBrush="{DynamicResource Brush.Border2}" BorderThickness="1" Background="{DynamicResource Brush.Contents}" CornerRadius="4" Padding="4">
-        <ContentControl>
-          <ContentControl.Content>
-            <Binding Path="EndPoint">
-              <Binding.TargetNullValue>
-                <Border HorizontalAlignment="Center" VerticalAlignment="Center" Background="{DynamicResource Brush.Accent}" CornerRadius="4">
-                  <TextBlock Text="{DynamicResource Text.Worktree}" Classes="monospace" Margin="4,2" Foreground="#FFDDDDDD"/>
-                </Border>
-              </Binding.TargetNullValue>
-            </Binding>
-          </ContentControl.Content>
-        </ContentControl>
+        <ContentControl Content="{Binding EndPoint}"/>
       </Border>
     </Grid>