SelfControl

Overview

SelfControl is the best completely free website blocker for Mac. It's open-source, donation-supported, and creates system-level blocks that can't be bypassed even by restarting your computer. It stands out for one key reason: it's impossible to undo once activated.

Features

• Unbreakable Blocks: Once set, blocks cannot be disabled until the timer expires
• Website Blacklist: Block specific websites for a set period
• Whitelist Mode: Block everything except specified sites
• Custom Block Lists: Create lists of sites to block together
• Flexible Timers: Set block duration from minutes to hours
• System-Level Blocking: Blocks persist across all browsers and apps
• Survives Restart: Blocks remain active even if you restart your Mac
• Survives Deletion: Deleting the app doesn't disable active blocks
• Free and Open Source: Completely free with source code available
• Donation-Supported: Sustained by user donations
• Privacy-Focused: No data collection or tracking
• Lightweight: Minimal system resource usage

The Unbreakable Promise

SelfControl is designed to be impossible to bypass:

• Can't uninstall: Deleting the app doesn't remove active blocks
• Can't restart: Rebooting your Mac doesn't end the blocking session
• Can't disable: No "emergency off" switch exists
• Only workaround: Reinstalling macOS entirely (which nobody does for website access)

This extreme approach makes SelfControl uniquely effective for people who need ironclad commitment to avoid distractions.

Best For

• Mac users who need absolute distraction blocking
• People who tend to override softer blocking tools
• Students preparing for exams who need nuclear-level blocking
• Writers on strict deadlines
• Anyone who values free, open-source software
• Users who want simple, no-nonsense blocking without features creep

Platform

macOS Exclusive: Available only for Mac computers.

Pricing

Completely Free: No cost, no subscriptions, no paid features. Optional donations appreciated.

User Warning

Before using SelfControl, users should understand:

• Once you start a session, you CANNOT stop it early
• There is no "undo" or "I changed my mind" option
• Make sure your blocked site list is correct before starting
• Don't block sites you might urgently need (email, banking, etc.)

Comparison to Paid Alternatives

While Freedom ($40/year) and FocusMe offer more features and cross-platform support, SelfControl wins for:

• Being completely free
• Maximum blocking strength on Mac
• Simplicity and focused purpose
• Open-source transparency

Community

Active open-source community maintains and improves the app. Users can contribute code, report bugs, or suggest features on GitHub.

Updates

Regularly updated to maintain compatibility with new macOS versions. The project has been maintained for over a decade, demonstrating long-term sustainability.

Recognition

Consistently ranked as one of the best free productivity apps for Mac in 2026, particularly praised for its uncompromising approach to distraction blocking.