Quick answer
Use the narrowest tool that solves the problem.
- Screen Time: best for a free, built-in Safari restriction.
- Safari extension: best for browser-specific rules you are comfortable managing inside Safari.
- Mac-level blocker: best for recurring schedules and blocking that does not depend on a Safari extension.
What “website blocker for Safari” can mean
A Safari website blocker can live in one of three places: macOS settings, a Safari extension, or a separate Mac app. Each layer gives you a different balance of convenience, browser coverage, scheduling, and friction when you try to turn it off.
Safari blocking works differently on a Mac than on an iPhone. This guide stays with macOS, where Screen Time, extensions, and Mac-level apps have distinct roles.
Use Screen Time to restrict websites in Safari
Screen Time is the simplest place to start because it is already part of macOS. You can add specific domains to Safari’s restricted list without downloading another app.
- Open System Settings. Select Screen Time and turn on App & Website Activity if it is not already active.
- Open Content & Privacy. Turn the section on, then select App Store, Media, Web, & Games.
- Change Safari web access. Choose Limit Adult Websites, open Customize, and add each unwanted domain to the Restricted list.
- Verify the result. Open each domain in Safari and test any subdomain you visit separately.
Tradeoff: this is a straightforward Safari restriction, but it is not a dedicated recurring schedule for a custom list of distracting sites.
Apple describes the current options under App Store, Media, Web, & Games settings.
Install a Safari website-blocking extension
A Safari extension is useful when you only care about Safari and want controls that live inside the browser. Extensions can be quick to install and may offer custom lists, timers, or page-level interventions.
The same convenience creates the main limitation: Safari lets you turn an extension off from Settings, and an extension does not automatically control another browser. Check what website permissions the extension requests and whether it works in Private Browsing before relying on it.
- Open Safari Extensions. In Safari, choose Safari > Safari Extensions to browse the Mac App Store.
- Review permissions. Check which websites the extension can read or change and whether its blocking model fits your goal.
- Enable and test it. Open Safari > Settings > Extensions, enable the extension, and test normal and private windows.
Best for: people who use Safari exclusively and want browser-specific controls.
Apple’s Safari extensions guide explains installation, permissions, Private Browsing behavior, and how extensions are disabled.
Use a Mac-level scheduled website blocker
A separate Mac blocker fits a different job: make a recurring boundary hold across the workday without depending on an individual Safari extension. This is useful when the problem is not configuring a list—it is disabling that list when you feel distracted.
Cactus blocks selected websites at the Mac level during recurring days and hours. It does not require a Safari extension, keeps its schedule locally, and shows when access returns. A Mac administrator can still remove it deliberately.
- Browser setup: no Safari extension
- Schedule: recurring days and hours
- Boundary: harder to undo impulsively
Best for: people who want distracting sites blocked automatically during predictable focus hours.
See the complete explanation of how Cactus blocks websites on Mac, including the administrator boundary and current product limits.
Compare Safari website-blocking options
| Option | Works beyond Safari | Recurring hours | Easy to disable |
|---|---|---|---|
| Screen Time restriction | Designed around Apple’s web controls | No custom site schedule | Settings remain available |
| Safari extension | No | Depends on extension | Can be disabled in Safari |
| Mac-level blocker | Yes, on the Mac | Yes | Depends on the blocker |
Start with Screen Time when a free Safari restriction is enough. Choose an extension for Safari-only customization. Choose a Mac-level scheduled blocker when recurring hours and resistance to impulsive changes matter more than browser-specific features.
A short checklist before choosing
- Do you use only Safari, or do you switch browsers?
- Do you want a permanent restriction, a daily allowance, or recurring hours?
- How easy should it be to change the block during an active period?
- Does the tool explain its permissions and administrator boundary?
- Can you see when the block ends without opening a settings window?
Frequently asked questions
Does Safari have a built-in website blocker?
Safari does not place a general blocklist in its own settings, but macOS Screen Time can restrict specific websites for Safari. Open System Settings, choose Screen Time, then use Content & Privacy and the Safari web-content controls to add restricted domains.
Can I block websites in Safari without Screen Time?
Yes. You can install a Safari extension or use a separate Mac-level website blocker. An extension stays inside Safari and can be disabled there; a Mac-level blocker can apply the rule without relying on a browser extension.
Will a Safari extension block the same site in Chrome?
No. A Safari extension controls Safari. If you also use Chrome, Firefox, or another browser, you need that product’s support for each browser or a blocker that enforces the website rule at the Mac level.
Does Cactus need access to my Safari history?
No. Cactus does not use a Safari extension or provide a cloud dashboard. The recurring schedule and blocking state stay on the Mac, which blocks the domains you choose during the scheduled hours.
Related guide
Want to compare every built-in option? See the practical differences between Screen Time restrictions, daily limits, and recurring website blocking.
