diff --git a/StardewXnbHack/Framework/PlatformContext.cs b/StardewXnbHack/Framework/PlatformContext.cs
index 184fe84..1a0fbd6 100644
--- a/StardewXnbHack/Framework/PlatformContext.cs
+++ b/StardewXnbHack/Framework/PlatformContext.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using StardewModdingAPI.Toolkit;
@@ -26,35 +27,81 @@ public bool Is(params Platform[] platforms)
             return platforms.Contains(this.Platform);
         }
 
-        /// <summary>Detect the game folder, if any.</summary>
-        public string DetectGameFolder()
+        /// <summary>Get the absolute paths to the game and content folders, if found.</summary>
+        /// <param name="specifiedPath">The game path specified by the user, if any.</param>
+        /// <param name="gamePath">The absolute path to the game folder, if found.</param>
+        /// <param name="contentPath">The absolute path to the content folder, if found.</param>
+        /// <returns>Returns whether both the game and content folders were found.</returns>
+        public bool TryDetectGamePaths(string specifiedPath, out string gamePath, out string contentPath)
         {
-            string assemblyDirPath = AppDomain.CurrentDomain.BaseDirectory;
+            gamePath = null;
+            contentPath = null;
 
-            return this.IsGameFolder(assemblyDirPath)
-                ? assemblyDirPath
-                : new ModToolkit().GetGameFolders().FirstOrDefault()?.FullName;
-        }
+            // check possible game paths
+            foreach (string candidate in this.GetCandidateGamePaths(specifiedPath))
+            {
+                // detect paths
+                string curGamePath = this.TryGamePath(candidate);
+                string curContentPath = this.FindContentPath(curGamePath);
 
-        /// <summary>Get the relative path from the game folder to the content folder.</summary>
-        public string GetRelativeContentPath()
-        {
-            return this.Platform == Platform.Mac
-                ? "../../Resources/Content"
-                : "Content";
+                // valid game install found
+                if (curGamePath != null && curContentPath != null)
+                {
+                    gamePath = curGamePath;
+                    contentPath = curContentPath;
+                    return true;
+                }
+
+                // if game folder exists without a content folder, track the first found game path (i.e. the highest-priority one)
+                gamePath = gamePath ?? curGamePath;
+            }
+
+            return false;
         }
 
 
         /*********
         ** Private methods
         *********/
-        /// <summary>Get whether a folder contains the game files.</summary>
-        /// <param name="path">The absolute folder path to check.</param>
-        private bool IsGameFolder(string path)
+        /// <summary>Get the possible game paths.</summary>
+        /// <param name="specifiedPath">The game path specified by the user, if any.</param>
+        private IEnumerable<string> GetCandidateGamePaths(string specifiedPath = null)
         {
-            return
-                File.Exists(Path.Combine(path, this.GetExecutableFileName()))
-                && Directory.Exists(Path.Combine(path, this.GetRelativeContentPath()));
+            // specified path
+            if (!string.IsNullOrWhiteSpace(specifiedPath))
+                yield return specifiedPath;
+
+            // current working directory
+            yield return AppDomain.CurrentDomain.BaseDirectory;
+
+            // detected game path
+            string detectedPath = new ModToolkit().GetGameFolders().FirstOrDefault()?.FullName;
+            if (detectedPath != null)
+                yield return detectedPath;
+        }
+
+        /// <summary>Get the absolute path to the game folder, if it's valid.</summary>
+        /// <param name="path">The path to check for a game install.</param>
+        private string TryGamePath(string path)
+        {
+            // game path exists
+            if (path == null)
+                return null;
+            DirectoryInfo gameDir = new DirectoryInfo(path);
+            if (!gameDir.Exists)
+                return null;
+
+            // has game files
+            bool hasExecutable = File.Exists(Path.Combine(gameDir.FullName, this.GetExecutableFileName()));
+            if (!hasExecutable)
+                return null;
+
+            // isn't the build folder when compiled directly
+            bool isCompileFolder = File.Exists(Path.Combine(gameDir.FullName, "StardewXnbHack.exe.config"));
+            if (isCompileFolder)
+                return null;
+
+            return gameDir.FullName;
         }
 
         /// <summary>Get the filename for the Stardew Valley executable.</summary>
@@ -64,5 +111,44 @@ private string GetExecutableFileName()
                 ? "Stardew Valley.exe"
                 : "StardewValley.exe";
         }
+
+        /// <summary>Get the absolute path to the content folder for a given game, if found.</summary>
+        /// <param name="gamePath">The absolute path to the game folder.</param>
+        private string FindContentPath(string gamePath)
+        {
+            if (gamePath == null)
+                return null;
+
+            foreach (string relativePath in this.GetPossibleRelativeContentPaths())
+            {
+                DirectoryInfo folder = new DirectoryInfo(Path.Combine(gamePath, relativePath));
+                if (folder.Exists)
+                    return folder.FullName;
+            }
+
+            return null;
+        }
+
+        /// <summary>Get the possible relative paths for the current platform.</summary>
+        private IEnumerable<string> GetPossibleRelativeContentPaths()
+        {
+            // under game folder on most platforms
+            if (this.Platform != Platform.Mac)
+                yield return "Content";
+
+            // MacOS
+            else
+            {
+                // Steam paths
+                // - game path: StardewValley/Contents/MacOS
+                // - content:   StardewValley/Contents/Resources/Content
+                yield return "../Resources/Content";
+
+                // GOG paths
+                // - game path: Stardew Valley.app/Contents/MacOS
+                // - content:   Stardew Valley.app/Resources/Content
+                yield return "../../Resources/Content";
+            }
+        }
     }
 }
diff --git a/StardewXnbHack/Program.cs b/StardewXnbHack/Program.cs
index 7854d26..a4bfe79 100644
--- a/StardewXnbHack/Program.cs
+++ b/StardewXnbHack/Program.cs
@@ -85,18 +85,24 @@ public static void Run(Game1 game = null, string gamePath = null, Func<IUnpackCo
                     new DataWriter() // check last due to more expensive CanWrite
                 };
 
-                // get game info
+                // get paths
                 var platform = new PlatformContext();
-                context.GamePath = gamePath ?? platform.DetectGameFolder();
-                if (context.GamePath == null || !Directory.Exists(context.GamePath))
                 {
-                    logger.OnFatalError("Can't find Stardew Valley folder. Try running StardewXnbHack from the game folder instead.");
-                    return;
+                    if (platform.TryDetectGamePaths(gamePath, out gamePath, out string contentPath))
+                    {
+                        context.GamePath = gamePath;
+                        context.ContentPath = contentPath;
+                    }
+                    else
+                    {
+                        logger.OnFatalError(gamePath == null
+                            ? "Can't find Stardew Valley folder. Try running StardewXnbHack from the game folder instead."
+                            : $"Can't find the content folder for the game at {gamePath}. Is the game installed correctly?"
+                        );
+                        return;
+                    }
                 }
-
-                // get import/export paths
-                context.ContentPath = Path.Combine(context.GamePath, platform.GetRelativeContentPath());
-                context.ExportPath = context.ContentPath + " (unpacked)";
+                context.ExportPath = Path.Combine(context.GamePath, "Content (unpacked)");
                 logger.OnStepChanged(ProgressStep.GameFound, $"Found game folder: {context.GamePath}.");
 
                 // symlink files on Linux/Mac
diff --git a/StardewXnbHack/StardewXnbHack.csproj b/StardewXnbHack/StardewXnbHack.csproj
index b7bce93..e371bb2 100644
--- a/StardewXnbHack/StardewXnbHack.csproj
+++ b/StardewXnbHack/StardewXnbHack.csproj
@@ -6,7 +6,7 @@
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <RepositoryUrl>https://github.com/Pathoschild/StardewXnbHack</RepositoryUrl>
     <RepositoryType>git</RepositoryType>
-    <Version>1.0.1</Version>
+    <Version>1.0.2</Version>
 
     <!--build-->
     <TargetFramework>net452</TargetFramework>
@@ -24,7 +24,7 @@
   <ItemGroup>
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
     <PackageReference Include="Pathoschild.Stardew.ModBuildConfig" Version="3.2.2" />
-    <PackageReference Include="Platonymous.TMXTile" Version="1.5.8" />
+    <PackageReference Include="Platonymous.TMXTile" Version="1.5.9" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/release-notes.md b/release-notes.md
index 993fd4c..48b6975 100644
--- a/release-notes.md
+++ b/release-notes.md
@@ -1,10 +1,18 @@
 [← back to readme](README.md)
 
 # Release notes
+## 1.0.2
+Released 07 December 2020.
+
+* Assets on MacOS are now unpacked into the game folder instead of resources, for consistency with other platforms.
+* Improved error if the game's content folder is missing.
+* Fixed duplicate tile index properties in some cases.
+* Fixed unpack error on MacOS with Steam.
+
 ## 1.0.1
 Released 21 November 2020.
 
-* Updated TMXTile to 1.5.8 to fix `.tmx` map files losing tile index properties.
+* Fixed `.tmx` map files losing tile index properties.
 
 ## 1.0
 Released 04 October 2020.