diff --git a/src/emu/cpu/m68000/m68kcpu.h b/src/emu/cpu/m68000/m68kcpu.h
index ad73de70891..294d5ed3060 100644
--- a/src/emu/cpu/m68000/m68kcpu.h
+++ b/src/emu/cpu/m68000/m68kcpu.h
@@ -258,6 +258,29 @@ typedef struct _m68ki_cpu_core m68ki_cpu_core;
 
 
 /* Address error */
+/* sigjmp() on Mac OS X and *BSD in general saves signal contexts and is super-slow, use sigsetjmp() to tell it not to */
+#ifdef _BSD_SETJMP_H
+#define m68ki_set_address_error_trap(m68k) \
+	if(sigsetjmp(m68k->aerr_trap, 0) != 0) \
+	{ \
+		m68ki_exception_address_error(m68k); \
+		if(m68k->stopped) \
+		{ \
+			if (m68k->remaining_cycles > 0) \
+				m68k->remaining_cycles = 0; \
+			return m68k->initial_cycles; \
+		} \
+	}
+
+#define m68ki_check_address_error(m68k, ADDR, WRITE_MODE, FC) \
+	if((ADDR)&1) \
+	{ \
+		m68k->aerr_address = ADDR; \
+		m68k->aerr_write_mode = WRITE_MODE; \
+		m68k->aerr_fc = FC; \
+		siglongjmp(m68k->aerr_trap, 1); \
+	}
+#else
 #define m68ki_set_address_error_trap(m68k) \
 	if(setjmp(m68k->aerr_trap) != 0) \
 	{ \
@@ -269,6 +292,7 @@ typedef struct _m68ki_cpu_core m68ki_cpu_core;
 			return m68k->initial_cycles; \
 		} \
 	}
+#endif
 
 #define m68ki_check_address_error(m68k, ADDR, WRITE_MODE, FC) \
 	if((ADDR)&1) \
@@ -569,7 +593,11 @@ struct _m68ki_cpu_core
 	int  reset_cycles;
 	UINT32 tracing;
 
+#ifdef _BSD_SETJMP_H
+	sigjmp_buf aerr_trap;
+#else
 	jmp_buf aerr_trap;
+#endif
 	UINT32    aerr_address;
 	UINT32    aerr_write_mode;
 	UINT32    aerr_fc;