Upgrading to Sierra and updated Joe On Tech books] (October 1, 2016)
Joe Kissell
Speeding Up Your Mac
Speeding Up Your Mac (Version: 1.1, September 20, 2016; originally published June 21, 2016; discontinued on December 19, 2017 and replaced with Take Control of Speeding Up Your Mac, Second Edition)
Troubleshooting Your Mac
Troubleshooting Your Mac (Version: 1.1, September 20, 2016; originally published October 29, 2015; discontinued on December 19, 2017 and replaced with Take Control of Troubleshooting Your Mac, Third Edition)
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