diff --git a/BasiliskII/src/MacOSX/Makefile.gencpu b/BasiliskII/src/MacOSX/Makefile.gencpu
index d4eaf42b..ba11ccb4 100644
--- a/BasiliskII/src/MacOSX/Makefile.gencpu
+++ b/BasiliskII/src/MacOSX/Makefile.gencpu
@@ -1,7 +1,7 @@
 SRC = $(PROJECT_DIR)/../uae_cpu
 DST = $(BUILT_PRODUCTS_DIR)/gencpu_output
 VPATH = $(SRC) $(SRC)/compiler
-CFLAGS = -DUSE_XCODE=1 -I. -I../uae_cpu -I../UNIX
+CFLAGS = -DUSE_JIT_FPU -I. -I../uae_cpu -I../UNIX
 CXXFLAGS = -stdlib=libc++ $(CFLAGS)
 
 all: $(DST)/gencpu $(DST)/gencomp
diff --git a/SheepShaver/src/Unix/prefs_unix.cpp b/SheepShaver/src/Unix/prefs_unix.cpp
index 2a81e7bd..a4380d10 100644
--- a/SheepShaver/src/Unix/prefs_unix.cpp
+++ b/SheepShaver/src/Unix/prefs_unix.cpp
@@ -37,9 +37,6 @@ prefs_desc platform_prefs_items[] = {
 	{"mousewheellines", TYPE_INT32, false, "number of lines to scroll in mouse wheel mode 1"},
 	{"dsp", TYPE_STRING, false,            "audio output (dsp) device name"},
 	{"mixer", TYPE_STRING, false,          "audio mixer device name"},
-#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
-	{"ignoresegv", TYPE_BOOLEAN, false,    "ignore illegal memory accesses"},
-#endif
 	{"idlewait", TYPE_BOOLEAN, false,      "sleep when idle"},
 #ifdef USE_SDL_VIDEO
 	{"sdlrender", TYPE_STRING, false,      "SDL_Renderer driver (\"auto\", \"software\" (may be faster), etc.)"},
@@ -135,9 +132,6 @@ void AddPlatformPrefsDefaults(void)
 #else
 	PrefsReplaceString("dsp", "/dev/dsp");
 	PrefsReplaceString("mixer", "/dev/mixer");
-#endif
-#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
-	PrefsAddBool("ignoresegv", false);
 #endif
 	PrefsAddBool("idlewait", true);
 }