Mac storage basics · Library folders explained
Can I delete crash reports on a Mac?
Short answer: Yes, it's safe; they're usually small and macOS trims old ones itself. A large pile means one app keeps crashing — fix or update that app.
Yes. Crash and hang reports are kept so you or a developer can see what went wrong; macOS also trims old ones on its own. They're usually small, so deleting them rarely frees much — unless one app crashes constantly and has piled up reports.
The easiest place to view them is Console (in Applications → Utilities) under Crash Reports. A big, growing pile is a sign to update or reinstall that app rather than just clear the reports. General log housekeeping is covered in log files on a Mac.