- FMacPlatformProcess::IsSandboxedApplication will return true if and only if the application is running within an OS X application sandbox, this can be used to ensure that UE4 only accesses sandbox-safe APIs.
- The crashed application isn't held open waiting for the crash reporter as if you try it will then crash again in Apple's XPC code after exiting waitpid (with or without PLCrashReporter) & I've not yet been able to determine why.
- We can use a new 10.10 NSProcess call to access the OS version number - no need to access the CoreServices plist unless we want the build number (unavailable within the sandbox).
- Fixed some symbolication bugs, PLCrashReport crash reports will symbolicate reliably.
- We can't copy the crash text to the clipboard when handling an actual crash in OS X as that the code requires Objecive-C which is incompatible with POSIX-signal or Mach-O exception handling routines & will hang or crash the application again. This often results in an application icon that cannot be removed from the Dock & requires a force-restart of the machine.
#codereview michael.trepka
[CL 2466174 by Mark Satterthwaite in Main branch]
