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logd

Log literacy: all about the log

The macOS log is very different from those seen in Unix. This explains where and what log files are, how they get written, how much they store, and how quickly entries can be written.

February 8, 2023 Macs, Technology

Gaining control over the log with a new version of Ulbow

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A new Frequency view shows total log entries from different subsystems, helping you mute those that are clogging up your log.

February 7, 2023 Macs, Technology, Updates

Gaining control over your Mac’s log

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Does your Mac’s log go back far enough to be useful, or is it full of junk? Here’s how to control what takes up space, and a new version of Mints to help.

December 22, 2022 Macs, Technology, Updates

Rolling logs and anti-malware scans

Checking your Mac’s log assumes that the records are still there. What happens when they only last 24 hours, and you’re looking for anti-malware scans run once a day?

December 21, 2022 Macs, Technology, Updates

How some log entries vanish sooner than others

Sometimes, when you return to examine entries in the log a few hours after they were written, many of them have vanished. How come?

April 20, 2021 Macs, Technology

xattr: lock, a log file lock

Found in some supplementary log files in Sierra only, and contain a UUID which may refer to main log files.

December 30, 2017 xattr

xattr: com.apple.uuiddb.boot-uuid, log metadata

Found in supplementary log files in Sierra and High Sierra only. May contain a UUID reference to main log files.

December 30, 2017 xattr

xattr: com.apple.logd.metadata, log metadata

Attached to log tracev3 files in High Sierra only. Contents and function not known.

December 29, 2017 xattr

The unified log in High Sierra 10.13.1

High Sierra makes two significant changes to the unified log system, from Sierra. Here’s an evaluation of them.

November 22, 2017 Macs, Technology
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