Hi, I¹m trying to get darwinbuild to work with 10.5.2 manually (copying the dependencies manually). I¹m wondering if someone can offer some help as to figure out what file is missing and causing this: I created a dtrace script which I thought would show me what open file system call was failing: dtrace -n 'syscall::open*:entry { printf("%s %s => %d", execname, copyinstr(arg0), arg1); } The output from that shows no failed open calls. I¹m fairly certain the problem is a file somewhere which defines the platform specifications. Since I have a version of Xcode > 3 (which can¹t be named), I went ahead and copied all the platforms in /Developer/Platforms/ to BuildRoot/Developer/Platforms but no luck. Suggestions? root@RyanMac/# /Developer/usr/bin/xcodebuild 2008-04-01 01:58:10.943 xcodebuild[32690:10b] [MT] ASSERTION FAILURE in /SourceCache/DevToolsBase/DevToolsBase-1036/pbxcore/SpecificationTypes/XCPla tformSpecification.m:386 Details: The Mac OS X platform is missing - cannot set a default platform. Object: <XCPlatformSpecification> Method: +loadAllPlatforms Thread: <NSThread: 0x3e06a00>{name = (null), num = 1} Backtrace: 0 0x00bdffc7 -[XCAssertionHandler handleFailureInMethod:object:fileName:lineNumber:messageFormat:arguments:] (in DevToolsCore) 1 0x00bdfd3c _XCAssertionFailureHandler (in DevToolsCore) 2 0x00bd0470 +[XCPlatformSpecification loadAllPlatforms] (in DevToolsCore) 3 0x00bbbc0c XCInitializeCoreIfNeeded (in DevToolsCore) 4 0x0000a7e8 5 0x000027aa ** INTERNAL ERROR: Uncaught Exception ** Exception: ASSERTION FAILURE in /SourceCache/DevToolsBase/DevToolsBase-1036/pbxcore/SpecificationTypes/XCPla tformSpecification.m:386 Details: The Mac OS X platform is missing - cannot set a default platform. Object: <XCPlatformSpecification> Method: +loadAllPlatforms Thread: <NSThread: 0x3e06a00>{name = (null), num = 1} Backtrace: 0 0x00bdffc7 -[XCAssertionHandler handleFailureInMethod:object:fileName:lineNumber:messageFormat:arguments:] (in DevToolsCore) 1 0x00bdfd3c _XCAssertionFailureHandler (in DevToolsCore) 2 0x00bd0470 +[XCPlatformSpecification loadAllPlatforms] (in DevToolsCore) 3 0x00bbbc0c XCInitializeCoreIfNeeded (in DevToolsCore) 4 0x0000a7e8 5 0x000027aa Stack: 0 0x0089a24b __raiseError (in CoreFoundation) 1 0x011270fb objc_exception_throw (in libobjc.A.dylib) 2 0x00899d71 -[NSException raise] (in CoreFoundation) 3 0x00bdfd3c _XCAssertionFailureHandler (in DevToolsCore) 4 0x00bd0470 +[XCPlatformSpecification loadAllPlatforms] (in DevToolsCore) 5 0x00bbbc0c XCInitializeCoreIfNeeded (in DevToolsCore) 6 0x0000a7e8 7 0x000027aa Abort trap root@RyanMac/#