Hi All, I've just tried to build xnu (under 10B504 with 64 bit kernel) and that's what I am getting: $ darwinbuild -init 10B504 ... $ darwinbuild xnu ... *** Installing Headers ... *** Mounting special filesystems ... Mounting devfs ... And here it just stops. Log says: 17/09/09 8:47:51 PM fseventsd[45] could not open <</Volumes/ BuildRoot_10B504_20090917202117/dev/.fseventsd/fseventsd-uuid>> (No such file or directory) 17/09/09 8:47:51 PM fseventsd[45] failed to create the uuid file / Volumes/BuildRoot_10B504_20090917202117/dev/.fseventsd/fseventsd-uuid 17/09/09 8:47:51 PM fseventsd[45] disk logger: failed to open output file /Volumes/BuildRoot_10B504_20090917202117/dev/.fseventsd/ 000000000012caac (Operation not supported). mount point /Volumes/ BuildRoot_10B504_20090917202117/dev/.fseventsd 17/09/09 8:47:51 PM com.apple.ReportCrash.Root[3464] 2009-09-17 20:47:51.123 ReportCrash[3464:2903] Failed to create CSSymbolicatorRef for chroot 17/09/09 8:47:51 PM com.apple.ReportCrash.Root[3464] 2009-09-17 20:47:51.131 ReportCrash[3464:2903] Saved crash report for chroot [3462] version ??? (???) to /Library/Logs/DiagnosticReports/ chroot_2009-09-17-204751_localhost.crash 17/09/09 8:47:51 PM fseventsd[45] disk logger: failed to open output file /Volumes/BuildRoot_10B504_20090917202117/dev/.fseventsd/ 00000000001393dc (No such file or directory). mount point /Volumes/ BuildRoot_10B504_20090917202117/dev/.fseventsd chroot_2009-09-17-204751_localhost.crash: Process: chroot [3462] Path: /usr/sbin/chroot Identifier: chroot Version: ??? (???) Code Type: X86-64 (Native) Parent Process: sh [3411] Date/Time: 2009-09-17 20:47:51.019 +1000 OS Version: Mac OS X 10.6.1 (10B504) Report Version: 6 Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000002 Crashed Thread: Unknown Backtrace not available Unknown thread crashed with X86 Thread State (64-bit): rax: 0x0000000000000002 rbx: 0x0000000000000000 rcx: 0x0000000000000000 rdx: 0x0000000000000000 rdi: 0x0000000000000000 rsi: 0x0000000000000000 rbp: 0x0000000000000000 rsp: 0x0000000000000000 r8: 0x0000000000000000 r9: 0x0000000000000000 r10: 0x0000000000000000 r11: 0x0000000000000000 r12: 0x0000000000000000 r13: 0x0000000000000000 r14: 0x0000000000000000 r15: 0x0000000000000000 rip: 0x0000000100000d24 rfl: 0x0000000000010203 cr2: 0x0000000000000002 Binary images description not available Cheers, D