What does a Focus actually do?
A Focus decides which notifications reach you. In System Settings → Focus you can:
- Silence notifications, or allow only the people and apps you choose.
- Turn it on automatically at a set time, at a place, or when you open a particular app.
- Add Focus filters that change four Apple apps while it’s on: Calendar (only some calendars), Mail (only some accounts), Messages (only some conversations) and Safari (only one Tab Group).
- Share your Focus status, so apps can tell people you have notifications silenced.
Apple describes it the same way: a Focus lets you “pause and silence all notifications or allow only certain notifications”.
What doesn’t it do?
It has no blocklist. With a Work Focus on, every app still opens and every site still loads. The Safari filter is the closest it gets: it keeps your work Tab Group in view, but a new tab can still go anywhere.
What does Screen Time add?
Screen Time (System Settings → Screen Time) is the Mac’s built‑in tool for limiting apps and websites. It can cap how long you spend in apps and on sites, restrict websites, and set schedules for when you use the Mac.
It limits by time and by address. It can’t tell that the same site is work one minute and a detour the next, and limits you set for yourself are only as firm as the passcode protecting them.
What don’t Focus and Screen Time know?
What you’re working on. Focus acts on notifications and Screen Time on time, so neither can tell “SwiftUI MenuBarExtra not updating – Stack Overflow” (work) from “r/mechanicalkeyboards – Reddit” (not). That gap is where most afternoons go.
Third‑party tools fill it in different ways: blockers act on access, timers on time, trackers on hindsight, and a few newer apps judge what you’re doing against what you said you’d do. We compared the AI ones here.
How do you set up a Work Focus on a Mac?
- Open System Settings → Focus, click Add Focus, and choose Work.
- Under Allowed Notifications, pick the people and apps that may still reach you.
- Under Focus Filters, add Safari with the Tab Group for your task, and Mail with only your work account.
- Turn it on from Control Center, or schedule it for your working hours.
Then add the one thing Focus can’t do: notice when you drift. FocusNod reads only the app name and window title, asks once after a few minutes of clear drift, and never blocks anything.