title: AdHoc Installation fails on older iPad running iOS 5.1.1 - /usr/libexec/installd crashes
body: <p>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.</p>
  
  <p>The app has been built using XCode 5.1.1 and deployment target of iOS 4.3.</p>
  
  <p>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.</p>
  
  <p>Checking the logs I found crash of /usr/libexec/installd - see below.</p>
  
  <p>Btw the same happens when I try to install the app via iTunes, so it's not related to Testflight.</p>
  
  <p>Any hints on why this happens and how I can fix it would be highly appreciated.</p>
  
  <p>Patrick</p>
  
  <hr>
  
  <pre><code>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
  </code></pre>