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diff --git a/src/classes0/UPlatformMacOSX.pas b/src/classes0/UPlatformMacOSX.pas
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+unit UPlatformMacOSX;
+
+interface
+
+{$IFDEF FPC}
+  {$MODE Delphi}
+{$ENDIF}
+
+{$I switches.inc}
+
+uses
+  Classes,
+  ULog,
+  UPlatform;
+
+type
+  {**
+   * @abstract(Provides Mac OS X specific details.)
+   * @lastmod(August 1, 2008)
+   * The UPlatformMacOSX unit takes care of setting paths to resource folders.
+   *
+   * (Note for non-Maccies: "folder" is the Mac name for directory.)
+   *
+   * Note on the resource folders:
+   *  1. Installation of an application on the mac works as follows: Extract and copy an application
+   *     and if you don't like or need the application anymore you move the folder
+   *     to the trash - and you're done.
+   *  2. The use folders in the user's home directory is against Apple's guidelines
+   *     and strange to an average user.
+   *  3. Even worse is using /usr/local/... since all lowercase folders in / are
+   *     not visible to an average user in the Finder, at least not without some "tricks".
+   *
+   * The best way would be to store everything within the application bundle. However, this
+   * requires USDX to offer the handling of the resources. Until this is implemented, the
+   * second best solution is as follows:
+   *
+   * According to Aple guidelines handling of resources and folders should follow these lines:
+   *
+   * Acceptable places for files are folders named UltraStarDeluxe either in
+   *   /Library/Application Support/
+   * or
+   *   ~/Library/Application Support/
+   *
+   * So
+   * GetGameSharedPath could return
+   *   /Library/Application Support/UltraStarDeluxe/Resources/.
+   * GetGameUserPath could return
+   *   ~/Library/Application Support/UltraStarDeluxe/Resources/.
+   *
+   * Right now, only $HOME/Library/Application Support/UltraStarDeluxe/Resources
+   * is used. So every user needs the complete set of files and folders.
+   * Future versions may also use shared resources in
+   * /Library/Application Support/UltraStarDeluxe/Resources. However, this is not
+   * treated yet in the code outside this unit.
+   *
+   * USDX checks, whether GetGameUserPath exists. If not, USDX creates it.
+   * The existence of needed files is then checked and if a file is missing
+   * it is copied to there from within the Resources folder in the Application
+   * bundle, which contains the default files. USDX should not delete files or
+   * folders in Application Support/UltraStarDeluxe automatically or without
+   * user confirmation.
+   *}
+  TPlatformMacOSX = class(TPlatform)
+    private
+      {**
+       * GetBundlePath returns the path to the application bundle UltraStarDeluxe.app.
+       *}
+      function GetBundlePath: WideString;
+
+      {**
+       * GetApplicationSupportPath returns the path to
+       * $HOME/Library/Application Support/UltraStarDeluxe/Resources.
+       *}
+      function GetApplicationSupportPath: WideString;
+
+      {**
+       * see the description of @link(Init).
+       *}
+      procedure CreateUserFolders();
+      
+    public
+      {**
+       * Init simply calls @link(CreateUserFolders), which in turn scans the folder
+       * UltraStarDeluxe.app/Contents/Resources for all files and folders.
+       * $HOME/Library/Application Support/UltraStarDeluxe/Resources is then checked
+       * for their presence and missing ones are copied.
+       *}
+      procedure Init; override;
+
+      {**
+       * DirectoryFindFiles returns all entries of a folder with names and booleans
+       * about their type, i.e. file or directory.
+       *}
+      function  DirectoryFindFiles(Dir, Filter: WideString; ReturnAllSubDirs: boolean): TDirectoryEntryArray; override;
+
+      {**
+       * GetLogPath returns the path for log messages. Currently it is set to
+       * $HOME/Library/Application Support/UltraStarDeluxe/Resources/Log.
+       *}
+      function  GetLogPath        : WideString; override;
+
+      {**
+       * GetGameSharedPath returns the path for shared resources. Currently it is set to
+       * /Library/Application Support/UltraStarDeluxe/Resources.
+       * However it is not used.
+       *}
+      function  GetGameSharedPath : WideString; override;
+
+      {**
+       * GetGameUserPath returns the path for user resources. Currently it is set to
+       * $HOME/Library/Application Support/UltraStarDeluxe/Resources.
+       * This is where a user can add songs, themes, ....
+       *}
+      function  GetGameUserPath   : WideString; override;
+  end;
+
+implementation
+
+uses
+  SysUtils,
+  BaseUnix;
+
+procedure TPlatformMacOSX.Init;
+begin
+  CreateUserFolders();
+end;
+
+procedure TPlatformMacOSX.CreateUserFolders();
+var
+  RelativePath: string;
+  // BaseDir contains the path to the folder, where a search is performed.
+  // It is set to the entries in @link(DirectoryList) one after the other.
+  BaseDir: string;
+  // OldBaseDir contains the path to the folder, where the search started.
+  // It is used to return to it, when the search is completed in all folders.
+  OldBaseDir: string;
+  // This record contains the result of a file search with FindFirst or FindNext
+  SearchInfo: TSearchRec;
+  // These two lists contain all folder and file names found
+  // within the folder @link(BaseDir).
+  DirectoryList, FileList: TStringList;
+  // DirectoryIsFinished contains the index of the folder in @link(DirectoryList),
+  // which is the last one completely searched. Later folders are still to be
+  // searched for additional files and folders.
+  DirectoryIsFinished: longint;
+  Counter: longint;
+
+  UserPathName: string;
+const
+  // used to construct the @link(UserPathName)
+  PathName: string = '/Library/Application Support/UltraStarDeluxe/Resources';
+begin
+  // Get the current folder and save it in OldBaseDir for returning to it, when
+  // finished.
+  GetDir(0, OldBaseDir);
+
+  // UltraStarDeluxe.app/Contents/Resources contains all the default files and
+  // folders.
+  BaseDir := OldBaseDir + '/UltraStarDeluxe.app/Contents/Resources';
+  ChDir(BaseDir);
+
+  // Right now, only $HOME/Library/Application Support/UltraStarDeluxe/Resources
+  // is used.
+  UserPathName := GetEnvironmentVariable('HOME') + PathName;
+
+  DirectoryIsFinished := 0;
+  DirectoryList := TStringList.Create();
+  FileList := TStringList.Create();
+  DirectoryList.Add('.');
+  
+  // create the folder and file lists
+  repeat
+
+    RelativePath := DirectoryList[DirectoryIsFinished];
+    ChDir(BaseDir + '/' + RelativePath);
+    if (FindFirst('*', faAnyFile, SearchInfo) = 0) then
+    begin
+      repeat
+        if DirectoryExists(SearchInfo.Name) then
+        begin
+          if (SearchInfo.Name <> '.') and (SearchInfo.Name <> '..')  then
+            DirectoryList.Add(RelativePath + '/' + SearchInfo.Name);
+        end
+        else
+          Filelist.Add(RelativePath + '/' + SearchInfo.Name);
+      until (FindNext(SearchInfo) <> 0);
+    end;
+    FindClose(SearchInfo);
+    Inc(DirectoryIsFinished);
+  until (DirectoryIsFinished = DirectoryList.Count);
+
+  // create missing folders
+  for Counter := 0 to DirectoryList.Count-1 do
+  begin
+    if not ForceDirectories(UserPathName + '/' + DirectoryList[Counter]) then
+      Log.LogError('Failed to create the folder "'+ UserPathName + '/' + DirectoryList[Counter] +'"',
+                   'TPlatformMacOSX.CreateUserFolders');
+  end;
+  DirectoryList.Free();
+
+  // copy missing files
+  for Counter := 0 to Filelist.Count-1 do
+  begin
+    CopyFile(BaseDir      + '/' + Filelist[Counter],
+             UserPathName + '/' + Filelist[Counter], true);
+  end;
+  FileList.Free();
+
+  // go back to the initial folder
+  ChDir(OldBaseDir);
+end;
+
+function TPlatformMacOSX.GetBundlePath: WideString;
+var
+  i, pos : integer;
+begin
+  // Mac applications are packaged in folders.
+  // We have to cut the last two folders
+  // to get the application folder.
+
+  Result := ExtractFilePath(ParamStr(0));
+  for i := 1 to 2 do
+  begin
+    pos := Length(Result);
+    repeat
+      Delete(Result, pos, 1);
+      pos := Length(Result);
+    until (pos = 0) or (Result[pos] = '/');
+  end;
+end;
+
+function TPlatformMacOSX.GetApplicationSupportPath: WideString;
+const
+  PathName : string = '/Library/Application Support/UltraStarDeluxe/Resources';
+begin
+  Result := GetEnvironmentVariable('HOME') + PathName + '/';
+end;
+
+function TPlatformMacOSX.GetLogPath: WideString;
+begin
+  Result := GetApplicationSupportPath + 'Logs';
+end;
+
+function TPlatformMacOSX.GetGameSharedPath: WideString;
+begin
+  Result := GetApplicationSupportPath;
+end;
+
+function TPlatformMacOSX.GetGameUserPath: WideString;
+begin
+  Result := GetApplicationSupportPath;
+end;
+
+function TPlatformMacOSX.DirectoryFindFiles(Dir, Filter: WideString; ReturnAllSubDirs: boolean): TDirectoryEntryArray;
+var
+  i       : integer;
+  TheDir  : pdir;
+  ADirent : pDirent;
+  lAttrib : integer;
+begin
+  i := 0;
+  Filter := LowerCase(Filter);
+
+  TheDir := FPOpenDir(Dir);     
+  if Assigned(TheDir) then
+    repeat
+      ADirent := FPReadDir(TheDir);
+
+      if Assigned(ADirent) and (ADirent^.d_name <> '.') and (ADirent^.d_name <> '..') then
+      begin
+        lAttrib := FileGetAttr(Dir + ADirent^.d_name);
+        if ReturnAllSubDirs and ((lAttrib and faDirectory) <> 0) then
+        begin
+          SetLength(Result, i + 1);
+          Result[i].Name        := ADirent^.d_name;
+          Result[i].IsDirectory := true;
+          Result[i].IsFile      := false;
+          i := i + 1;
+        end
+        else if (Length(Filter) = 0) or (Pos( Filter, LowerCase(ADirent^.d_name)) > 0) then
+        begin
+          SetLength(Result, i + 1);
+          Result[i].Name        := ADirent^.d_name;
+          Result[i].IsDirectory := false;
+          Result[i].IsFile      := true;
+          i := i + 1;
+        end;
+      end;
+    until ADirent = nil;
+
+  FPCloseDir(TheDir);
+end;
+
+end.