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In Yosemite, there is a log file here:

/private/var/log/coreduetd.log

...but it's always empty. How do I make the system write events to it, assuming there are any?

  • I'm willing to start a bounty on this question, if it looks promising that it can be answered. – Redarm May 23 '15 at 12:56
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Unless you know that you've tinkered with the permissions on the file, it should be:

-rw-r--r-- 1 root wheel 0 Oct 18 11:02 /private/var/log/coreduetd.log

This logfile is empty on the 5 Yosemite Macs I have access to.

  • That's my experience as well and looking at CoreDuet's database, I see mentioned: power, thermal, sleep/wake events, etc.. I've also run all sorts of tests (e.g. memory_pressure) and would at some point expect content, if writing was enabled. There also is a private framework, which seems to be for debug logging (/System/Library/PrivateFrameworks/CoreDuetDebugLogging.framework) and I would hope there is a way to enable logging in a way to find content in this log. – Redarm Dec 16 '14 at 19:42

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