Just a couple of new features and a few fixed bugs? No, there is much more to 10.12.4 than that. Just look at what it does update.
macOS 10.12
It is probably the only new feature in Sierra 10.12.4 that you’ll encounter. What does it do, and does it work?
Apple has released the update to macOS Sierra 10.12.4, together with app updates for MainStage 3, Pages, Numbers, […]
It worked for a little while, then stopped working again. Yes, it’s a bug.
Just two days after its last update to macOS Sierra’s Gatekeeper Configuration Data, Apple has pushed out another […]
Overnight, Apple has pushed a silent update to the Gatekeeper security data for macOS 10.12 Sierra and, presumably, […]
In Sierra, does yours work properly, not work at all, or give you incorrect figures?
This new version includes its docs as a Help Book, and adds Tooltips to explain the output and controls.
This bug disrupts Time Machine backups and all the dozens of activities which macOS manages. It may make Sierra unsuitable for use in servers.
Is Time Machine becoming erratic? A simple diagnostic process can establish what the problem is, and how to deal with it.
The Eclectic Light Company 