A crash file stores information about application crashes on Apple Mac computers using macOS. A crash file is generated when an application fails and exits unexpectedly. The macOS Crash Reporter creates .crash files that contain diagnostic information to help determine why an application crashed. These .crash files are stored in the DiagnosticReports folder.
There are other unrelated file types that also use the .crash extension. For example, Steam crash data files use a .crash extension but are not related to macOS crash files. When dealing with .crash files, determine if they originate from macOS or another program.
To open a macOS .crash file, use Crash Reporter on the Mac. The crash data can help identify issues that caused the application failure. Other macOS .crash file viewers and editors may also be used to inspect the contents. Choose the appropriate tool to work with the .crash file.
macOS Console
Windows Event Viewer
Various Debuggers