The Most Important Reason to Upgrade to macOS Sierra: Security

When Apple launches a new version of one of its OSes, say, macOS Sierra, the first thing users think about is the features. If they’re a bit more methodical, they’ll look at their mission critical apps and monitor for updates from those developers. But, above all, a decision to not upgrade (or do it soon) must be balanced against the security updates folded into the new version.  John explains.