If you’ve never used the Mac’s Console application (Applications > Utilities), this article is a solid place to start. Not only does Kirk McElhearn show off some of the basic Console features, he also focuses on what’s new in the much improved macOS Sierra version.

Console is an important resource. Pretty much everything you do on the Mac ends up sending a message which is accumulated in a log somewhere. Console lets you read through those logs and, as Kirk shows you, this new version of Console makes it much easier to find what you are looking for.