HT202731: Using Apple Diagnostics
Learn about Using Apple Diagnostics
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Helpful answers
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Jul 1, 2015 7:15 PM in response to kachina200by Grant Bennet-Alder,1) When you see your Mac at its worst, note the time: Hour Minute second. Use console.app to read out the "all Messages" log, and cut and paste up to a pageful (no more, please) of text, not a screenshot. readers here (who are other Users like you) will look for clues. ---OR---
2) run a Utility that collects a bunch of data about how your Mac is being used right now. Etrecheck is such a Utility.
http://www.etresoft.com/etrecheck
Copy and paste the ouptut here.