Index: /trunk/ccl/lisp-kernel/x86-exceptions.c
===================================================================
--- /trunk/ccl/lisp-kernel/x86-exceptions.c	(revision 6261)
+++ /trunk/ccl/lisp-kernel/x86-exceptions.c	(revision 6262)
@@ -1262,4 +1262,6 @@
   install_signal_handler(SIGSEGV,bogus_signal_handler);
   install_signal_handler(SIGFPE, bogus_signal_handler);
+  /*  9.0.0d8 generates spurious SIGSYS from mach_msg_trap */
+  install_signal_handler(SIGSYS, bogus_signal_handler);
 #endif