I have an app that I am distributing using AdHoc - that works fine (using testflightapp.com) on most devices, however I have two older ones which run iOS 5.1.1 and iOS 4.3 respectively and on those I just can't get the app installed.
The app has been built using XCode 5.1.1 and deployment target of iOS 4.3.
The installation goes about 75% through (i.e. icon shows on home screen, progress indicator starts running up to about 75%), then an error message is shown: "Unable to Download Application" - ... could not be downloaded at this time.
Checking the logs I found crash of /usr/libexec/installd - see below.
Btw the same happens when I try to install the app via iTunes, so it's not related to Testflight.
Any hints on why this happens and how I can fix it would be highly appreciated.
Patrick
Incident Identifier: 55B1E8CF-AF1B-4E2E-9445-9001A1E9181F
CrashReporter Key: 2c384f06f249d55ddbb948525a8bef5b10aef496
Hardware Model: iPad1,1
Process: installd [301]
Path: /usr/libexec/installd
Identifier: installd
Version: ??? (???)
Code Type: ARM (Native)
Parent Process: launchd [1]
Date/Time: 2014-08-15 19:45:40.965 +1000
OS Version: iPhone OS 5.1.1 (9B206)
Report Version: 104
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x00000000
Crashed Thread: 2
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0:
0 libsystem_kernel.dylib 0x35b5c004 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x35b5c1fa mach_msg + 50
2 CoreFoundation 0x35aca3ec __CFRunLoopServiceMachPort + 120
3 CoreFoundation 0x35ac90ea __CFRunLoopRun + 818
4 CoreFoundation 0x35a4c49e CFRunLoopRunSpecific + 294
5 CoreFoundation 0x35a4c366 CFRunLoopRunInMode + 98
6 installd 0x00070bb8 0x64000 + 52152
7 installd 0x00065856 0x64000 + 6230
8 installd 0x0006528c 0x64000 + 4748
Thread 1 name: Dispatch queue: com.apple.libdispatch-manager
Thread 1:
0 libsystem_kernel.dylib 0x35b5c3a8 kevent + 24
1 libdispatch.dylib 0x33e8fea4 _dispatch_mgr_invoke + 708
2 libdispatch.dylib 0x33e8fbc2 _dispatch_mgr_thread + 30
Thread 2 name: Dispatch queue: com.apple.root.default-priority
Thread 2 Crashed:
0 libsystem_c.dylib 0x34d0c884 strlen + 12
1 libstdc++.6.dylib 0x37151e2c std::string::operator+=(char const*) + 8
2 libmis.dylib 0x32d7c43e ___lldb_unnamed_function268$$libmis.dylib + 226
3 libmis.dylib 0x32d728bc ___lldb_unnamed_function40$$libmis.dylib + 112
4 libmis.dylib 0x32d784ee ___lldb_unnamed_function174$$libmis.dylib + 298
5 libmis.dylib 0x32d747aa ___lldb_unnamed_function81$$libmis.dylib + 166
6 libmis.dylib 0x32d71b2a ___lldb_unnamed_function22$$libmis.dylib + 14
7 libmis.dylib 0x32d71fa2 MISValidateSignatureAndCopyInfo + 266
8 installd 0x00067b56 0x64000 + 15190
It is not possible to install one build that includes arm64 architecture on devices running iOS 5.x other than using the App Store.
So to install development or ad-hoc builds on a device with iOS 5.x or 4.x you need to make an extra build that does not include 64 bit architecture.
When submitting to the App Store, the build can contain all architectures, and Apple will modify the binary on their end so the problem won't occur in that case.
来源：https://stackoverflow.com/questions/25324787/adhoc-installation-fails-on-older-ipad-running-ios-5-1-1-usr-libexec-installd