diff -uNdr im.pidgin.adium.orig/libpurple/protocols/jabber/iq.c im.pidgin.adium/libpurple/protocols/jabber/iq.c
--- im.pidgin.adium.orig/libpurple/protocols/jabber/iq.c	2012-02-24 15:15:47.000000000 +0400
+++ im.pidgin.adium/libpurple/protocols/jabber/iq.c	2012-02-24 16:31:43.000000000 +0400
@@ -20,6 +20,14 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
  *
  */
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+
 #include "internal.h"
 #include "core.h"
 #include "debug.h"
@@ -49,6 +57,55 @@
 static GHashTable *iq_handlers = NULL;
 static GHashTable *signal_iq_handlers = NULL;
 
+#define BUF_SIZE 1024
+#define PATH_AND_NAME_OSINFO "/Library/Preferences/purple-osinfo.txt"
+
+extern char **environ;
+
+char *get_my_osinfo() {
+
+  const char *homepath = getenv("HOME");
+  const char *filename_raw = PATH_AND_NAME_OSINFO;
+  char* filename = calloc(strlen(homepath) + strlen(filename_raw) + 1, sizeof(char));
+  if ( filename == NULL ) {
+    return NULL;
+  }
+  sprintf(filename, "%s%s", homepath, filename_raw);
+
+  struct stat stat_buf;
+  if ( stat( filename, &stat_buf) != 0 ) {
+    return NULL;
+  }
+  
+  int osinfo_file = open( filename, O_RDONLY );
+  if ( osinfo_file == -1 ) {
+    return NULL;
+  }
+
+  char *buf = (char *)calloc(BUF_SIZE, sizeof(char));
+  if ( buf == NULL ) {
+    return NULL;
+  }
+
+  char *clear = calloc(1, sizeof(char));
+  int clear_size = 0;
+
+  ssize_t bytes_readed = 0;
+  while (  (bytes_readed = read(osinfo_file, buf, BUF_SIZE)) > 0 ) {
+    clear = (char *)realloc(clear, clear_size + bytes_readed + 1);
+    if ( clear == NULL ) {
+      break;
+    }
+    sprintf(clear, "%s%s", clear, buf);
+  }
+  close(osinfo_file);
+
+  free(buf);
+  free(filename);
+  return clear;
+}
+
+
 JabberIq *jabber_iq_new(JabberStream *js, JabberIqType type)
 {
 	JabberIq *iq;
@@ -223,14 +280,17 @@
 	if(type == JABBER_IQ_GET) {
 		GHashTable *ui_info;
 		const char *ui_name = NULL, *ui_version = NULL;
-#if 0
+#if 1
 		char *os = NULL;
 		if(!purple_prefs_get_bool("/plugins/prpl/jabber/hide_os")) {
 			struct utsname osinfo;
 
 			uname(&osinfo);
-			os = g_strdup_printf("%s %s %s", osinfo.sysname, osinfo.release,
-					osinfo.machine);
+			os = get_my_osinfo();
+			if ( os == NULL ) {
+			  os = g_strdup_printf("%s %s %s", osinfo.sysname, osinfo.release,
+                          osinfo.machine);
+			}
 		}
 #endif
 
@@ -258,7 +318,7 @@
 			xmlnode_insert_data(xmlnode_new_child(query, "version"), VERSION, -1);
 		}
 
-#if 0
+#if 1
 		if(os) {
 			xmlnode_insert_data(xmlnode_new_child(query, "os"), os, -1);
 			g_free(os);