--- zipfile.py.orig	2005-06-29 08:49:55.075161712 +0200
+++ zipfile.py	2005-06-29 09:16:50.348602824 +0200
@@ -1,6 +1,6 @@
 "Read and write ZIP files."
 
-import struct, os, time
+import struct, os, time, sys
 import binascii
 
 try:
@@ -131,7 +131,6 @@
         self.compress_type = ZIP_STORED # Type of compression for the file
         self.comment = ""               # Comment for each file
         self.extra = ""                 # ZIP extra data
-        self.create_system = 0          # System which created ZIP archive
         self.create_version = 20        # Version which created ZIP archive
         self.extract_version = 20       # Version needed to extract archive
         self.reserved = 0               # Must be zero
@@ -139,6 +138,32 @@
         self.volume = 0                 # Volume number of file header
         self.internal_attr = 0          # Internal attributes
         self.external_attr = 0          # External file attributes
+        
+# set System which created ZIP archive ("version made by") accourding 
+# to ZIP format specification        
+#       
+#          0 - MS-DOS and OS/2 (FAT / VFAT / FAT32 file systems)
+#          1 - Amiga                     2 - OpenVMS
+#          3 - Unix                      4 - VM/CMS
+#          5 - Atari ST                  6 - OS/2 H.P.F.S.
+#          7 - Macintosh                 8 - Z-System
+#          9 - CP/M                     10 - Windows NTFS
+#         11 - MVS (OS/390 - Z/OS)      12 - VSE
+#         13 - Acorn Risc               14 - VFAT
+#         15 - alternate MVS            16 - BeOS
+#         17 - Tandem                   18 - OS/400
+#         19 - OS/X (Darwin)            20 thru 255 - unused
+        
+        if os.name.startswith("posix"):
+            if sys.platform.startswith("darwin"):
+                self.create_system = 19
+            else:
+                self.create_system = 3
+        elif os.name.startswith("mac"):
+            self.create_system = 7 
+        else:
+            self.create_system = 0
+        
         # Other attributes are set by class ZipFile:
         # header_offset         Byte offset to the file header
         # file_offset           Byte offset to the start of the file data