System Logs DiagnosticMessages
This folder stores macOS diagnostic log messages used for troubleshooting system and app issues during normal operation.
What is System Logs DiagnosticMessages?
DiagnosticMessages is a macOS system log location under /private/var/log that stores diagnostic and troubleshooting messages generated by the operating system and sometimes by system components or apps. These records may be used when reviewing crashes, errors, hardware behavior, or other technical issues during support and debugging.
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Safety overview
Status: Use with caution
This is a system-managed logging location. Its contents are generally not essential user data, but they can be useful for diagnosing problems, and modifying or removing system log folders can interfere with troubleshooting or expected system logging behavior.
Recommendation: Leave this folder in place and let macOS manage it. If disk usage appears unusually high, review overall log growth with care rather than manually deleting or altering this system path.
File path
/private/var/log/DiagnosticMessages
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