Index: framework/src/objc/RBRuntime.m
===================================================================
--- framework/src/objc/RBRuntime.m	(revision 1899)
+++ framework/src/objc/RBRuntime.m	(working copy)
@@ -549,8 +549,115 @@
 
 #else /* > TIGER */
 
-#error No implementation yet for this system (please contact lsansonetti@apple.com)
+#include <setjmp.h>
 
+typedef struct {
+  jmp_buf _state;
+  void *_exception;
+  void *_others;
+  void *_thread;
+  void *_reserved1;
+} NSHandler2;
+
+typedef struct {
+  CFIndex _qstate;
+  CFIndex _altHandlerCtr;
+  CFIndex _numHandlerSlots;
+  CFIndex _numHandlers;
+  NSHandler2 *_handlers[0];
+} NSEHData;
+
+typedef struct _NSAPPage {
+  struct _NSAPPage *_higherPage;
+  struct _NSAPPage *_lowerPage;
+  NSUInteger _numItems;
+  void *_items[0];
+} NSAPPage;
+
+typedef struct {
+  NSUInteger _startSlot;
+  NSAPPage *_startPage;
+  NSAutoreleasePool *_instance;
+} NSAPPoolTuple;
+
+typedef struct {
+  NSAPPage *_topPage;
+  NSUInteger _numItems;
+  NSUInteger _highWat;
+  NSUInteger _highWatRes;
+  NSUInteger _poppingCount;
+  BOOL _releaseEnabled;
+  BOOL _freedObjectCheck;
+  BOOL _ignoreExceptions;
+  BOOL _topIsSubclass;
+  CFIndex _qstate;
+  NSAPPage *_freePages;
+  NSAutoreleasePool *_poolCache[4];
+  NSUInteger _numPoolSlots;
+  NSUInteger _numPools;
+  NSAPPoolTuple _pools[0];
+} NSAPData;
+
+extern void *_NSAutoreleasePoolGetRubyToken(void);
+extern void _NSAutoreleasePoolSetRubyToken(void *t);
+extern void *_NSExceptionGetRubyToken(void);
+extern void _NSExceptionSetRubyToken(void *t);
+
+# define NSTHREAD_autoreleasePool_set(t, d) (_NSAutoreleasePoolSetRubyToken(d))
+# define NSTHREAD_autoreleasePool_get(t)    (_NSAutoreleasePoolGetRubyToken())
+
+static void *NSTHREAD_autoreleasePool_init(void *thread)
+{
+  NSAPData *newData;
+
+  newData = malloc(sizeof(NSAPData) + 8 * sizeof(NSAPPoolTuple));
+  ASSERT_ALLOC(newData);
+
+  newData->_topPage = NULL;
+  newData->_numItems = 0;
+  newData->_highWat = 0;
+  newData->_highWatRes = 0;
+  newData->_poppingCount = 0;
+  newData->_releaseEnabled = YES;
+  newData->_freedObjectCheck = NO;
+  newData->_ignoreExceptions = NO;
+  newData->_topIsSubclass = NO;
+  newData->_qstate = 0;
+  newData->_freePages = NULL;
+  newData->_poolCache[0] = nil;
+  newData->_poolCache[1] = nil;
+  newData->_poolCache[2] = nil;
+  newData->_poolCache[3] = nil;
+  newData->_numPoolSlots = 8;
+  newData->_numPools = 0;
+  unsigned idx;
+  for (idx = 0; idx < 8; idx++) {
+    newData->_pools[idx]._startSlot = 0;
+    newData->_pools[idx]._startPage = NULL;
+    newData->_pools[idx]._instance = nil;
+  }
+  return newData;
+}
+  
+# define NSTHREAD_excHandlers_get(t)      (_NSExceptionGetRubyToken())
+# define NSTHREAD_excHandlers_set(t, d)   (_NSExceptionSetRubyToken(d))
+# define NSTHREAD_excHandlers_free(t, d)  (free(d))
+
+static void *NSTHREAD_excHandlers_init(void *t)
+{
+  NSEHData *new_data;
+
+  new_data = (NSEHData *)malloc(sizeof(NSEHData) + (32 * sizeof(NSHandler2 *)));
+  new_data->_numHandlerSlots = 32;
+  new_data->_numHandlers = 0;
+  new_data->_altHandlerCtr = 0;
+  new_data->_qstate = 0;
+
+  return new_data;
+}
+
+# define NSTHREAD_NEEDS_TO_SAVE 0 
+
 #endif
 
 struct rb_cocoa_thread_context