Can Focus or Screen Time Block Apps and Websites on Mac? (macOS 27)

If you've turned on Focus and still ended up on YouTube ten minutes later, nothing went wrong. Focus was never built to stop you from opening anything. It controls what can interrupt you, and that's all.

Blocking lives in Screen Time. It works, with one catch that decides whether it will work for you: which browser you use.

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Short answer

Focus silences notifications. It doesn't block apps or websites.
Screen Time can block apps and websites, and limit app categories by time of day.
The catch: Apple describes website blocking for Safari. If you work in Chrome or Firefox, test it before you rely on it.
Best setup: use Focus for interruptions, Screen Time for the apps you open by habit, and lock the settings if you keep undoing them.

What Each Mac Setting Actually Stops

Setting	Silences notifications	Stops an app opening	Stops a website loading	Easy to undo?
Focus	Yes	No	No	Yes, one click
Time Allowances	No	Yes, by category, when time runs out	Not described by Apple	Yes, unless locked
Screen Time Schedule	No	Yes, outside allowed hours	Not described by Apple	Yes, unless locked
Blocked list	No	Yes	Yes, in Safari; test other browsers	Yes, unless locked

Those labels come from Apple's macOS 27 guide. If your Mac runs an older version, you'll see the old names: App Limits and Downtime. Apple also says the latest Screen Time features need version 27 or later on all your Apple devices, so your menus may differ if some of them haven't updated.

Focus: Good for Interruptions, Not for Habits

Apple describes Focus as a way to pause and silence notifications. A notification from Slack stays quiet, but Slack still opens the moment you click it.

That still matters. An alert you never see is one less reason to leave your work. To set it up:

Go to System Settings > Focus.
Click Add Focus, then pick Work or create a custom one.
Under Allowed People and Allowed Apps, choose Allow Some People and Allow Some Apps, then keep each list short.
Turn off Time Sensitive Notifications if you want real quiet. Leave it on if you rely on Calendar alerts, since Apple lists Calendar as one of the apps that uses them.
Under Set a Schedule, add the hours you work.

Two options are worth knowing about:

Focus filters: these can change how Calendar, Mail, Messages, and Safari behave. For example, Safari can show only your work Tab Groups during a Work Focus. Your distracting tabs stay out of sight, but they aren't blocked.
App-based schedules: a Focus can start when you open a chosen app. It also ends when you close that app or switch to another one, so this suits long sessions in one app better than work spread across several.

For how the iPhone version compares, see our guide to Focus Mode vs Do Not Disturb.

Screen Time: Where the Real Blocking Is

First, turn it on: go to System Settings > Screen Time, click Manage Screen Time, then turn on App & Website Activity.

Block a specific app or website

In System Settings > Screen Time, click Apps & Websites.
Open the Blocked list.
Click Add, then add the app or website.

Use this for the sites you never need during work. Apple describes the list as covering your Apple devices, so check your iPhone afterward if you only meant to block something on your Mac.

Limit app categories by time

Time Allowances set how long you can use a category such as Social Media, Entertainment, or Games. Screen Time Schedules set which hours those categories are available. Apple's macOS 27 guide walks through both.

Apple describes both in terms of app categories. For a single website, use the Blocked list.

Lock it, or it won't hold

When a Time Allowance runs out, an unlocked Mac offers an Ignore Limit option. If you're the person you're trying to stop, that button is easy to press.

Lock Screen Time Settings requires a passcode to change settings and to allow more time. A passcode you chose yourself is only a small speed bump, so ask a partner or friend to set it. The same problem shows up on phones, and we cover it in our guide to hard-to-undo iPhone blockers.

The Chrome and Firefox Problem

This is where most Mac setups fail. Apple's macOS 27 family guide talks about blocking "specific apps and websites in Safari." It doesn't promise the same for other browsers.

Users have been reporting this gap for years. In a 2023 Apple Community thread about macOS Ventura, a user found sites blocked in Safari but not in Chrome or Firefox.

We checked the current picture on a Mac running macOS 27.0.1. Neither Chrome 156 nor Firefox 159 linked Apple's Screen Time framework. That's a strong hint, not a live block test. Your result is the one that counts, and it takes two minutes to get.

Test your own Mac:

Add a site you don't need to your Blocked list.
Open that site in Safari. It should be blocked.
Open it in every other browser you have.

If it loads, your website block only covers Safari. You then have two ways to fix that:

Block the other browsers. If Safari can handle your work, add Chrome and Firefox to the Blocked list. They stay blocked until you remove them, so this only suits a Mac where you don't need them.
Block inside the browser you use. If your work needs Chrome, use a browser blocker instead. Our AppBlock vs BlockSite comparison covers two options for phones and browsers.

A Simple Mac Setup That Holds Up

Create a Work Focus on a schedule, with short allowed lists.
Add your two or three worst sites to the Blocked list.
Run the browser test and close any gap it finds.
Add a Time Allowance for the app category that costs you the most time.
Ask someone else to set the passcode if you've undone your limits before.

Start small. A long block list tends to catch something you need, and that's when people turn the whole thing off.

If you keep getting past these settings, a dedicated blocker is the next step. We compared Cold Turkey, Freedom, and SelfControl on what happens when you try to quit. If you keep turning blocks off, first work out why it keeps happening.

If your Mac is also covered in old downloads and screenshots, our desktop organization system takes care of the visual side. For the wider habit, see how to reduce screen time.

Frequently Asked Questions

Does Focus block apps on Mac?

No. Focus on a Mac pauses and silences notifications. Every app still opens, and every website still loads. To stop an app from opening, use the Blocked list in Screen Time.

How do I block a website on a Mac without installing anything?

On macOS 27, go to System Settings > Screen Time > Apps & Websites, open the Blocked list, and add the website. Turn on App & Website Activity first. Test the block in every browser you use, because Apple only describes this kind of website blocking for Safari.

Does Screen Time block websites in Chrome and Firefox on Mac?

Don't assume it does. Apple's guides describe website blocking in Safari and don't promise it for other browsers. On our macOS 27.0.1 Mac, neither Chrome 156 nor Firefox 159 linked Apple's Screen Time framework. That isn't a live block test, so add a test site to your Blocked list and try it in each browser.

Where did App Limits and Downtime go on macOS 27?

The features were renamed and reworked. Time Allowances set how long you can use categories of apps, and Screen Time Schedules set when they're available. You'll find both under System Settings > Screen Time.

Can I get past a Screen Time limit on Mac?

Yes, unless the settings are locked. Without a passcode, you can choose to ignore the limit when it runs out. Lock Screen Time Settings requires a passcode to change settings or allow more time, and it works best if someone else sets the code.

Should I use Focus or Screen Time on my Mac?

Use both, because they solve different problems. Focus stops apps from interrupting you. Screen Time stops you from opening the apps and sites you go to out of habit.