Text is a big part of working with a Mac. Work with text faster by using a couple of text-selection shortcuts. They work almost everywhere.
Spotify wants to run at startup. Maybe you don't want it to. Turns out it's not obvious how to make it stop. This article tells you how.
Mac Mail app couldn't send or receive. Settings were right, and the account worked on an iPhone. Cleaned with Malwarebytes-- problem solved.