diff -dur a/mac_alias/alias.py b/mac_alias/alias.py
--- a/mac_alias/alias.py
+++ b/mac_alias/alias.py
@@ -258,10 +258,10 @@
         alias = Alias()
         alias.appinfo = appinfo
             
-        alias.volume = VolumeInfo (volname.replace('/',':'),
+        alias.volume = VolumeInfo (volname.decode().replace('/',':'),
                                    voldate, fstype, disktype,
                                    volattrs, volfsid)
-        alias.target = TargetInfo (kind, filename.replace('/',':'),
+        alias.target = TargetInfo (kind, filename.decode().replace('/',':'),
                                    folder_cnid, cnid,
                                    crdate, creator_code, type_code)
         alias.target.levels_from = levels_from
@@ -276,9 +276,9 @@
                 b.read(1)
 
             if tag == TAG_CARBON_FOLDER_NAME:
-                alias.target.folder_name = value.replace('/',':')
+                alias.target.folder_name = value.decode().replace('/',':')
             elif tag == TAG_CNID_PATH:
-                alias.target.cnid_path = struct.unpack(b'>%uI' % (length // 4),
+                alias.target.cnid_path = struct.unpack('>%uI' % (length // 4),
                                                            value)
             elif tag == TAG_CARBON_PATH:
                 alias.target.carbon_path = value
@@ -313,9 +313,9 @@
                 alias.target.creation_date \
                     = mac_epoch + datetime.timedelta(seconds=seconds)
             elif tag == TAG_POSIX_PATH:
-                alias.target.posix_path = value
+                alias.target.posix_path = value.decode()
             elif tag == TAG_POSIX_PATH_TO_MOUNTPOINT:
-                alias.volume.posix_path = value
+                alias.volume.posix_path = value.decode()
             elif tag == TAG_RECURSIVE_ALIAS_OF_DISK_IMAGE:
                 alias.volume.disk_image_alias = Alias.from_bytes(value)
             elif tag == TAG_USER_HOME_LENGTH_PREFIX:
@@ -467,12 +467,12 @@
 
         b.write(struct.pack(b'>hhQhhQ',
                 TAG_HIGH_RES_VOLUME_CREATION_DATE,
-                8, long(voldate * 65536),
+                8, int(voldate * 65536),
                 TAG_HIGH_RES_CREATION_DATE,
-                8, long(crdate * 65536)))
+                8, int(crdate * 65536)))
 
         if self.target.cnid_path:
-            cnid_path = struct.pack(b'>%uI' % len(self.target.cnid_path),
+            cnid_path = struct.pack('>%uI' % len(self.target.cnid_path),
                                     *self.target.cnid_path)
             b.write(struct.pack(b'>hh', TAG_CNID_PATH,
                                  len(cnid_path)))