More effective is to mute those entries from persistent storage altogether, using the command Although you can change the mode from Info to Default, that has relatively little effect. Meaning that all log entries of Info and Default status were saved in persistent storage, in the Persist log files. While you can create and install those property lists yourself, the simplest way to mute log entries for a specific subsystem is in Terminal, where the log config command creates, edits and removes those property lists for you.įor example, before changing anything for the subsystem, I looked at its defaults using Log preferences are controlled by property list files stored in /Library/Preferences/Logging, where there are two folders, one for files setting preferences for Processes, the other for Subsystems. The cost of a cleaner log is that you won’t be able to inspect muted entries until you remove their mute. If you do want to enable their entries again, that’s easily done, although it won’t of course be retrospective. This doesn’t affect those subsystems in the slightest: they’ll keep running just the same, but won’t flood your log with their incessant chatter. Use the popup menu to look at individual subsystems too, and the tooltips on chart bars show the number of log entries in that period.ĭraw up a shortlist of subsystems that you can, for the time being at least, lose from your log. In both cases, inspecting five-minute sample periods showed high and sustained rates of log entry through the night. Ulbow has a chart view that should prove useful here. Other offenders might be FindMy and iCloud, which don’t seem to rest much overnight. You’re also likely to come across many entries from that you’re little interested in. These reflect what I should already be able to inspect elsewhere, so can be dispensed with. In my case, I found frequent runs of entries when macOS checked the status of its UPS, from the subsystem. Be careful when you do this to disable Ulbow from either getting or showing signposts, as they’re handled separately, and don’t count as main log entries. The next step is to identify some subsystems that can be safely muted, and that needs a little exploration using a log browser like Ulbow. Don’t turn the fire alarm off because the noise is annoying you! If there is, you need to diagnose and fix that before going any further. The first and most important check is that these log entries aren’t pathological, that there isn’t a problem causing them. During quiet hours running, my production iMac Pro clocked up a median of over 6,000 log entries every minute, while my Mac Studio managed less that 4,000 entries per minute at the same times. This appears more likely on Intel Macs that run awake 24/7, perhaps providing services to other systems. If the period is less than two days, then you’ll probably want to do something to address that. If the period shown for the log is long enough for your needs, you can be comforted by that result. I will leave version 1.9 available for those who want to run Mints on Sierra. Sadly, because of changes Apple has made in Xcode, this version no longer supports Sierra, but should work fine on High Sierra and later. Mints 1.10 is now available from here: mints110įrom Downloads above, from its Product Page, and via its auto-update mechanism. These are explained in its 35 page Help book. This includes the log period, as shown in the latest version of XProCheck, and additional information about the number of different types of log file. Mints version 1.10 adds a new button, to generate a report on the current state of the log. This article looks at what you can do about it, and brings a new version of my free utility Mints to help. The more rapidly new entries are added to it, the shorter the period covered by the log. This occurs because, rather than retaining log entries for a set period, macOS keeps them down to a maximum size. Recently it has become apparent that, in some Macs, the length of log retained at any time has become far too short, not uncommonly less than two days, and in some cases less than 24 hours. And if your Mac does get into trouble, sometimes its logs are the only place you’ll find the clues that lead you to a solution. If you want to check whether Time Machine backups are working correctly, or if your Mac’s new anti-malware scans are occurring, there’s no real alternative. Few of us look in our logs often, but that doesn’t make them any less important.
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