The first detailed account of how macOS Sierra runs many of its background activities, complete with a diagram.
log
Improvements to help you see the wood from the trees in your logs.
Has Time Machine started to make irregular backups? Are apps stalling at odd times? This could be just the tool to find out why.
What would you like to see change in the next version of Consolation?
Significant bugs or undesirable features limiting log, Console, and os_log as of 10.12.4.
Sierra 10.12.4 introduced undocumented changes in the log system which may break apps which write to the logs. Here is Blowhole fixed for that change.
In an undocumented change, 10.12.4 prevents any access to reading Sierra’s log when in normal user mode – it requires admin mode.
Link to the slides from a masterly review by Sarah Edwards of the new log system in macOS Sierra.
Sierra doesn’t use and ‘roll’ traditional log files. For how long does it keep entries in its new log?
An explicit listing of terms which are useful in filtering Sierra’s logs. This list is maintained.
The Eclectic Light Company 