diff --git a/BasiliskII/src/Unix/Linux/NetDriver/sheep_net.c b/BasiliskII/src/Unix/Linux/NetDriver/sheep_net.c
index 80a585e1..ad55fb65 100644
--- a/BasiliskII/src/Unix/Linux/NetDriver/sheep_net.c
+++ b/BasiliskII/src/Unix/Linux/NetDriver/sheep_net.c
@@ -21,7 +21,11 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/version.h>
+#include <linux/init.h>
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,15,0)
+#define LINUX_3_15
+#endif
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)
 #define LINUX_26_35
@@ -153,6 +157,9 @@ struct SheepVars {
 	u32 ipfilter;				/* Only receive IP packets destined for this address (host byte order) */
 	char eth_addr[6];			/* Hardware address of the Ethernet card */
 	char fake_addr[6];			/* Local faked hardware address (what SheepShaver sees) */
+#ifdef LINUX_3_15
+	atomic_t got_packet;
+#endif
 };
 
 
@@ -390,7 +397,12 @@ static ssize_t sheep_net_read(struct file *f, char *buf, size_t count, loff_t *o
 			break;
 
 		/* No packet in queue and in blocking mode, so block */
+#ifdef LINUX_3_15
+		atomic_set(&v->got_packet, 0);
+		wait_event_interruptible(v->wait, atomic_read(&v->got_packet));
+#else
 		interruptible_sleep_on(&v->wait);
+#endif
 
 		/* Signal received? Then bail out */
 		if (signal_pending(current))
@@ -731,7 +743,17 @@ static int sheep_net_receiver(struct sk_buff *skb, struct net_device *dev, struc
 	skb_queue_tail(&v->queue, skb);
 
 	/* Unblock blocked read */
+#ifdef LINUX_3_15
+
+	atomic_set(&v->got_packet, 1);
+
+	wake_up_interruptible(&v->wait);
+
+#else
+
 	wake_up(&v->wait);
+
+#endif
 	return 0;
 
 drop:
diff --git a/BasiliskII/src/Unix/Makefile.in b/BasiliskII/src/Unix/Makefile.in
index d1c8bb70..cc82326d 100644
--- a/BasiliskII/src/Unix/Makefile.in
+++ b/BasiliskII/src/Unix/Makefile.in
@@ -97,7 +97,7 @@ OBJS := $(SRCS_LIST_TO_OBJS)
 SRCS := $(SRCS:%=@top_srcdir@/%)
 
 define GUI_SRCS_LIST_TO_OBJS
-	$(addprefix $(OBJ_DIR)/, $(addsuffix .go, $(foreach file, $(GUI_SRCS), \
+	$(addprefix $(OBJ_DIR)/, $(addsuffix .guio, $(foreach file, $(GUI_SRCS), \
 	$(basename $(notdir $(file))))))
 endef
 GUI_OBJS = $(GUI_SRCS_LIST_TO_OBJS)
@@ -204,7 +204,7 @@ $(OBJ_DIR)/%.o : %.mm
 	$(CXX) $(CPPFLAGS) $(DEFS) $(CXXFLAGS) -c $< -o $@
 $(OBJ_DIR)/%.o : %.s
 	$(CC) $(CPPFLAGS) $(DEFS) $(CFLAGS) -c $< -o $@
-$(OBJ_DIR)/%.go : %.cpp
+$(OBJ_DIR)/%.guio : %.cpp
 	$(CXX) $(CPPFLAGS) $(DEFS) $(CXXFLAGS) $(GUI_CFLAGS) -DSTANDALONE_GUI -c $< -o $@
 
 # Windows resources
diff --git a/BasiliskII/src/Unix/configure.ac b/BasiliskII/src/Unix/configure.ac
index 7dc71bce..62dd5adc 100644
--- a/BasiliskII/src/Unix/configure.ac
+++ b/BasiliskII/src/Unix/configure.ac
@@ -124,7 +124,7 @@ case "$target_cpu" in
   m68k* ) HAVE_M68K=yes;;
   sparc* ) HAVE_SPARC=yes;;
   powerpc* ) HAVE_POWERPC=yes;;
-  x86_64* ) HAVE_X86_64=yes;;
+  x86_64* | amd64* ) HAVE_X86_64=yes;;
 esac
 
 dnl Check if we should really be assuming x86_64 even if we detected HAVE_I386 above.
@@ -534,6 +534,9 @@ mips-sony-bsd|mips-sony-newsos4)
 	no_dev_ptmx=1
 	LIBS="$LIBS -lstdc++"
 	;;
+*-*-freebsd*)
+	no_dev_ptmx=1
+	;;
 esac
 
 if test -z "$no_dev_ptmx" ; then
diff --git a/BasiliskII/src/Unix/sigsegv.cpp b/BasiliskII/src/Unix/sigsegv.cpp
index 347e0f4f..7e94b761 100644
--- a/BasiliskII/src/Unix/sigsegv.cpp
+++ b/BasiliskII/src/Unix/sigsegv.cpp
@@ -243,9 +243,7 @@ static void powerpc_decode_instruction(instruction_t *instruction, unsigned int
 
 #if HAVE_SIGINFO_T
 // Generic extended signal handler
-#if defined(__FreeBSD__)
-#define SIGSEGV_ALL_SIGNALS				FAULT_HANDLER(SIGBUS)
-#elif defined(__hpux)
+#if defined(__hpux)
 #define SIGSEGV_ALL_SIGNALS				FAULT_HANDLER(SIGSEGV) FAULT_HANDLER(SIGBUS)
 #else
 #define SIGSEGV_ALL_SIGNALS				FAULT_HANDLER(SIGSEGV)
@@ -285,9 +283,15 @@ static void powerpc_decode_instruction(instruction_t *instruction, unsigned int
 #endif
 #if defined(__FreeBSD__) || defined(__OpenBSD__)
 #if (defined(i386) || defined(__i386__))
+#undef SIGSEGV_ALL_SIGNALS
+#define SIGSEGV_ALL_SIGNALS				FAULT_HANDLER(SIGBUS)
 #define SIGSEGV_FAULT_INSTRUCTION		(((struct sigcontext *)scp)->sc_eip)
 #define SIGSEGV_REGISTER_FILE			((SIGSEGV_REGISTER_TYPE *)&(((struct sigcontext *)scp)->sc_edi)) /* EDI is the first GPR (even below EIP) in sigcontext */
 #define SIGSEGV_SKIP_INSTRUCTION		ix86_skip_instruction
+#elif (defined(x86_64) || defined(__x86_64__))
+#define SIGSEGV_FAULT_INSTRUCTION		(((struct sigcontext *)scp)->sc_rip)
+#define SIGSEGV_REGISTER_FILE			((SIGSEGV_REGISTER_TYPE *)&(((struct sigcontext *)scp)->sc_rdi))
+#define SIGSEGV_SKIP_INSTRUCTION		ix86_skip_instruction
 #endif
 #endif
 #if defined(__NetBSD__)
@@ -807,6 +811,25 @@ enum {
 	X86_REG_ESI = 1,
 	X86_REG_EDI = 0
 #endif
+#if (defined(x86_64) || defined(__x86_64__))
+	X86_REG_EDI = 0,
+	X86_REG_ESI = 1,
+	X86_REG_EDX = 2,
+	X86_REG_ECX = 3,
+	X86_REG_R8  = 4,
+	X86_REG_R9  = 5,
+	X86_REG_EAX = 6,
+	X86_REG_EBX = 7,
+	X86_REG_EBP = 8,
+	X86_REG_R10 = 9,
+	X86_REG_R11 = 10,
+	X86_REG_R12 = 11,
+	X86_REG_R13 = 12,
+	X86_REG_R14 = 13,
+	X86_REG_R15 = 14,
+	X86_REG_EIP = 19,
+	X86_REG_ESP = 22,
+#endif
 };
 #endif
 #if defined(__OpenBSD__)
diff --git a/BasiliskII/src/Unix/vm_alloc.cpp b/BasiliskII/src/Unix/vm_alloc.cpp
index 4d3569c0..0a669292 100644
--- a/BasiliskII/src/Unix/vm_alloc.cpp
+++ b/BasiliskII/src/Unix/vm_alloc.cpp
@@ -72,6 +72,11 @@ typedef unsigned long vm_uintptr_t;
 #ifndef MAP_32BIT
 #define MAP_32BIT 0
 #endif
+#ifdef __FreeBSD__
+#define FORCE_MAP_32BIT MAP_FIXED
+#else
+#define FORCE_MAP_32BIT MAP_32BIT
+#endif
 #ifndef MAP_ANON
 #define MAP_ANON 0
 #endif
@@ -82,7 +87,7 @@ typedef unsigned long vm_uintptr_t;
 #define MAP_EXTRA_FLAGS (MAP_32BIT)
 
 #ifdef HAVE_MMAP_VM
-#if (defined(__linux__) && defined(__i386__)) || HAVE_LINKER_SCRIPT
+#if (defined(__linux__) && defined(__i386__)) || defined(__FreeBSD__) || HAVE_LINKER_SCRIPT
 /* Force a reasonnable address below 0x80000000 on x86 so that we
    don't get addresses above when the program is run on AMD64.
    NOTE: this is empirically determined on Linux/x86.  */
@@ -118,7 +123,7 @@ static int translate_map_flags(int vm_flags)
 	if (vm_flags & VM_MAP_FIXED)
 		flags |= MAP_FIXED;
 	if (vm_flags & VM_MAP_32BIT)
-		flags |= MAP_32BIT;
+		flags |= FORCE_MAP_32BIT;
 	return flags;
 }
 #endif
diff --git a/SheepShaver/src/MacOSX/Launcher/VMListController.h b/SheepShaver/src/MacOSX/Launcher/VMListController.h
index f0437fae..70b453d9 100644
--- a/SheepShaver/src/MacOSX/Launcher/VMListController.h
+++ b/SheepShaver/src/MacOSX/Launcher/VMListController.h
@@ -20,7 +20,11 @@
 
 #import <Cocoa/Cocoa.h>
 
-@interface VMListController : NSWindowController {
+@interface VMListController : NSWindowController
+#if __MAC_OS_X_VERSION_MAX_ALLOWED >= 1060
+    <NSTableViewDataSource, NSTableViewDelegate>
+#endif
+{
 	IBOutlet NSTableView *vmList;
 	IBOutlet NSButton *newButton;
 	IBOutlet NSButton *importButton;
diff --git a/SheepShaver/src/MacOSX/Launcher/VMSettingsController.h b/SheepShaver/src/MacOSX/Launcher/VMSettingsController.h
index 82b85865..2e3a237a 100644
--- a/SheepShaver/src/MacOSX/Launcher/VMSettingsController.h
+++ b/SheepShaver/src/MacOSX/Launcher/VMSettingsController.h
@@ -21,6 +21,9 @@
 #import <Cocoa/Cocoa.h>
 
 @interface VMSettingsController : NSWindowController
+#if __MAC_OS_X_VERSION_MAX_ALLOWED >= 1060
+    <NSTableViewDataSource>
+#endif
 {
     BOOL cancelWasClicked;
 
diff --git a/SheepShaver/src/MacOSX/Launcher/VMSettingsController.mm b/SheepShaver/src/MacOSX/Launcher/VMSettingsController.mm
index 8dc2c099..c45eacf8 100644
--- a/SheepShaver/src/MacOSX/Launcher/VMSettingsController.mm
+++ b/SheepShaver/src/MacOSX/Launcher/VMSettingsController.mm
@@ -211,7 +211,7 @@ static NSString *makeRelativeIfNecessary(NSString *path)
 - (IBAction) addDisk: (id) sender
 {
   NSOpenPanel *open = [NSOpenPanel openPanel];
-  [open setCanChooseDirectories:NO];
+  [open setCanChooseDirectories:YES];
   [open setAllowsMultipleSelection:NO];
   [open setTreatsFilePackagesAsDirectories:YES];
   [open beginSheetForDirectory: [[NSFileManager defaultManager] currentDirectoryPath]
diff --git a/SheepShaver/src/MacOSX/XcodeBuildHowTo.txt b/SheepShaver/src/MacOSX/XcodeBuildHowTo.txt
new file mode 100644
index 00000000..2a8899ba
--- /dev/null
+++ b/SheepShaver/src/MacOSX/XcodeBuildHowTo.txt
@@ -0,0 +1,26 @@
+The Xcode SheepShaver project makes it easier to build SheepShaver as a
+Universal Binary (with 3 architectures: i386, x86_64 and ppc).
+
+This is an optional build system that does not affect the existing
+autogen/configure based build system, which is still fully supported.
+The Xcode project will build SheepShaver with configuration
+"--enable-sdl-audio --enable-sdl-video --disable-vosf".
+
+The Xcode project lives in has been tested to work on Snow Leopard
+64-bit with Xcode 3.2.6 and the 10.4 SDK installed. It may not work
+under newer versions of Xcode or Mac OS X.
+
+To use it, you need the following:
+
+1. A complete 'macemu' git checkout of SheepShaver and BasiliskII.
+2. SDL installed as a framework in /Library/Frameworks/SDL.framework.
+3. You do not need to run autogen.sh / configure to use the Xcode
+project. If you've done so already, you should remove or temporarily
+move/rename src/Unix/config.h, as the presence of that file currently
+conflicts with the Xcode build and will cause errors in Xcode.
+
+With the above all set, you should be able to launch the Xcode project
+and build SheepShaver, resulting in a UB build containing SDL as a
+private framework in the bundle. The result will be located in either
+SheepShaver/src/MacOSX/build/Debug or SheepShaver/src/MacOSX/build/Release
+directories, depending if you do a Debug or Release build.
diff --git a/SheepShaver/src/Unix/Linux/sheepthreads.c b/SheepShaver/src/Unix/Linux/sheepthreads.c
index 7cff5b75..a286d067 100644
--- a/SheepShaver/src/Unix/Linux/sheepthreads.c
+++ b/SheepShaver/src/Unix/Linux/sheepthreads.c
@@ -48,19 +48,19 @@ extern int test_and_set(int *var, int val);
 /* Linux kernel calls */
 extern int __clone(int (*fn)(void *), void *, int, void *);
 
-/* struct sem_t */
+/* libc no longer provides struct _pthread_fastlock in pthread.h */
+struct fastlock {
+	int status;
+	int spinlock;
+};
+
 typedef struct {
-	struct _pthread_fastlock __sem_lock;
-	int __sem_value;
-	_pthread_descr __sem_waiting;
+	struct fastlock sem_lock;
+	int sem_value;
+	int sem_waiting;
 } sem_t;
 
 #define SEM_VALUE_MAX 64
-#define status __status
-#define spinlock __spinlock
-#define sem_lock __sem_lock
-#define sem_value __sem_value
-#define sem_waiting __sem_waiting
 
 /* Wait for "clone" children only (Linux 2.4+ specific) */
 #ifndef __WCLONE
@@ -185,13 +185,13 @@ void pthread_testcancel(void)
    need to make sure that the compiler has flushed everything to memory.  */
 #define MEMORY_BARRIER() __asm__ __volatile__ ("sync" : : : "memory")
 
-static void fastlock_init(struct _pthread_fastlock *lock)
+static void fastlock_init(struct fastlock *lock)
 {
 	lock->status = 0;
 	lock->spinlock = 0;
 }
 
-static int fastlock_try_acquire(struct _pthread_fastlock *lock)
+static int fastlock_try_acquire(struct fastlock *lock)
 {
 	int res = EBUSY;
 	if (test_and_set(&lock->spinlock, 1) == 0) {
@@ -205,14 +205,14 @@ static int fastlock_try_acquire(struct _pthread_fastlock *lock)
 	return res;
 }
 
-static void fastlock_acquire(struct _pthread_fastlock *lock)
+static void fastlock_acquire(struct fastlock *lock)
 {
 	MEMORY_BARRIER();
 	while (test_and_set(&lock->spinlock, 1))
 		usleep(0);
 }
 
-static void fastlock_release(struct _pthread_fastlock *lock)
+static void fastlock_release(struct fastlock *lock)
 {
 	MEMORY_BARRIER();
 	lock->spinlock = 0;
@@ -226,10 +226,7 @@ static void fastlock_release(struct _pthread_fastlock *lock)
 
 int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *mutex_attr)
 {
-	fastlock_init(&mutex->__m_lock);
-	mutex->__m_kind = mutex_attr ? mutex_attr->__mutexkind : PTHREAD_MUTEX_TIMED_NP;
-	mutex->__m_count = 0;
-	mutex->__m_owner = NULL;
+	fastlock_init((struct fastlock *)mutex);
 	return 0;
 }
 
@@ -240,12 +237,7 @@ int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *mutex_
 
 int pthread_mutex_destroy(pthread_mutex_t *mutex)
 {
-	switch (mutex->__m_kind) {
-	case PTHREAD_MUTEX_TIMED_NP:
-		return (mutex->__m_lock.__status != 0) ? EBUSY : 0;
-	default:
-		return EINVAL;
-	}
+	return (((struct fastlock *)mutex)->status != 0) ? EBUSY : 0;
 }
 
 
@@ -255,13 +247,8 @@ int pthread_mutex_destroy(pthread_mutex_t *mutex)
 
 int pthread_mutex_lock(pthread_mutex_t *mutex)
 {
-	switch (mutex->__m_kind) {
-	case PTHREAD_MUTEX_TIMED_NP:
-		fastlock_acquire(&mutex->__m_lock);
-		return 0;
-	default:
-		return EINVAL;
-	}
+	fastlock_acquire((struct fastlock *)mutex);
+	return 0;
 }
 
 
@@ -271,12 +258,7 @@ int pthread_mutex_lock(pthread_mutex_t *mutex)
 
 int pthread_mutex_trylock(pthread_mutex_t *mutex)
 {
-	switch (mutex->__m_kind) {
-	case PTHREAD_MUTEX_TIMED_NP:
-		return fastlock_try_acquire(&mutex->__m_lock);
-	default:
-		return EINVAL;
-	}
+	return fastlock_try_acquire((struct fastlock *)mutex);
 }
 
 
@@ -286,13 +268,8 @@ int pthread_mutex_trylock(pthread_mutex_t *mutex)
 
 int pthread_mutex_unlock(pthread_mutex_t *mutex)
 {
-	switch (mutex->__m_kind) {
-	case PTHREAD_MUTEX_TIMED_NP:
-		fastlock_release(&mutex->__m_lock);
-		return 0;
-	default:
-		return EINVAL;
-	}
+	fastlock_release((struct fastlock *)mutex);
+	return 0;
 }
 
 
@@ -302,7 +279,6 @@ int pthread_mutex_unlock(pthread_mutex_t *mutex)
 
 int pthread_mutexattr_init(pthread_mutexattr_t *attr)
 {
-	attr->__mutexkind = PTHREAD_MUTEX_TIMED_NP;
 	return 0;
 }
 
@@ -333,7 +309,7 @@ int sem_init(sem_t *sem, int pshared, unsigned int value)
 	}
 	fastlock_init(&sem->sem_lock);
 	sem->sem_value = value;
-	sem->sem_waiting = NULL;
+	sem->sem_waiting = 0;
 	return 0;
 }
 
@@ -353,7 +329,7 @@ int sem_destroy(sem_t *sem)
 		return -1;
 	}
 	sem->sem_value = 0;
-	sem->sem_waiting = NULL;
+	sem->sem_waiting = 0;
 	return 0;
 }
 
@@ -374,7 +350,7 @@ int sem_wait(sem_t *sem)
 		fastlock_release(&sem->sem_lock);
 		return 0;
 	}
-	sem->sem_waiting = (struct _pthread_descr_struct *)((long)sem->sem_waiting + 1);
+	sem->sem_waiting++;
 	while (sem->sem_value == 0) {
 		fastlock_release(&sem->sem_lock);
 		usleep(0);
@@ -398,7 +374,7 @@ int sem_post(sem_t *sem)
 	}
 	fastlock_acquire(&sem->sem_lock);
 	if (sem->sem_waiting)
-		sem->sem_waiting = (struct _pthread_descr_struct *)((long)sem->sem_waiting - 1);
+		sem->sem_waiting--;
 	else {
 		if (sem->sem_value >= SEM_VALUE_MAX) {
 			errno = ERANGE;
@@ -466,4 +442,4 @@ int main(void)
 		return 5;
 	return 0;
 }
-#endif
+#endif
\ No newline at end of file
diff --git a/SheepShaver/src/Unix/Makefile.in b/SheepShaver/src/Unix/Makefile.in
index e779835e..9bb39077 100644
--- a/SheepShaver/src/Unix/Makefile.in
+++ b/SheepShaver/src/Unix/Makefile.in
@@ -97,7 +97,7 @@ endef
 OBJS = $(SRCS_LIST_TO_OBJS)
 
 define GUI_SRCS_LIST_TO_OBJS
-	$(addprefix $(OBJ_DIR)/, $(addsuffix .go, $(foreach file, $(GUI_SRCS), \
+	$(addprefix $(OBJ_DIR)/, $(addsuffix .guio, $(foreach file, $(GUI_SRCS), \
 	$(basename $(notdir $(file))))))
 endef
 GUI_OBJS = $(GUI_SRCS_LIST_TO_OBJS)
@@ -195,7 +195,7 @@ $(OBJ_DIR)/%.o : %.S
 	$(CPP) $(CPPFLAGS) -D__ASSEMBLY__ $< -o $*.out.s
 	$(AS) $(ASFLAGS) -o $@ $*.out.s
 	rm $*.out.s
-$(OBJ_DIR)/%.go : %.cpp
+$(OBJ_DIR)/%.guio : %.cpp
 	$(CXX) $(CPPFLAGS) $(DEFS) $(CXXFLAGS) $(GUI_CFLAGS) -DSTANDALONE_GUI -c $< -o $@
 
 # Kheperix CPU emulator
diff --git a/SheepShaver/src/Unix/configure.ac b/SheepShaver/src/Unix/configure.ac
index f44ed628..d4f56097 100644
--- a/SheepShaver/src/Unix/configure.ac
+++ b/SheepShaver/src/Unix/configure.ac
@@ -484,6 +484,9 @@ mips-sony-bsd|mips-sony-newsos4)
 *-*-darwin*)
 	no_dev_ptmx=1
 	;;
+*-*-freebsd*)
+	no_dev_ptmx=1
+	;;
 esac
 
 if test -z "$no_dev_ptmx" ; then
diff --git a/SheepShaver/src/Unix/main_unix.cpp b/SheepShaver/src/Unix/main_unix.cpp
index aa23fc86..3d0ee43e 100644
--- a/SheepShaver/src/Unix/main_unix.cpp
+++ b/SheepShaver/src/Unix/main_unix.cpp
@@ -90,6 +90,7 @@
 #include <sys/ipc.h>
 #include <sys/shm.h>
 #include <sys/stat.h>
+#include <sys/param.h>
 #include <signal.h>
 
 #include "sysdeps.h"
diff --git a/SheepShaver/src/Unix/sysdeps.h b/SheepShaver/src/Unix/sysdeps.h
index 3f34375d..0099527b 100644
--- a/SheepShaver/src/Unix/sysdeps.h
+++ b/SheepShaver/src/Unix/sysdeps.h
@@ -69,7 +69,7 @@
 #endif
 
 // Fix offsetof() on FreeBSD and GCC >= 3.4
-#if defined(__FreeBSD__) && defined(__cplusplus)
+#if defined(__FreeBSD__) && defined(__cplusplus) && __GNUC__ < 4
 #undef offsetof
 /* The cast to "char &" below avoids problems with user-defined
    "operator &", which can appear in a POD type.  */