How to Lock Mac Apps with Password or Touch ID (3 Methods That Work)

Why macOS Doesn't Lock Individual Apps

macOS takes an all-or-nothing approach to security. You can lock your entire screen, enable FileVault for disk encryption, or use Screen Time restrictions, but there's no built-in way to lock individual apps with a password or Touch ID.

This creates problems when you share your Mac with family members, work in open offices, or simply want to protect sensitive apps like banking software or password managers without locking your entire computer.

Method 1: Built-in Screen Time Restrictions

macOS Screen Time can limit app access, but it's designed for parental controls rather than personal security:

1. Open System Settings → Screen Time
2. Click App & Website Limits
3. Add the apps you want to restrict
4. Set time limits (this blocks the app after the limit is reached)

The downside? This blocks apps based on time usage, not on-demand protection. Once you've used your "allowed time," the app is blocked until the next day. Not ideal for protecting apps you need regular access to.

Method 2: Terminal Commands and Folder Hiding

Some users try moving apps to hidden folders and creating password-protected disk images:

1. Create an encrypted disk image in Disk Utility
2. Move the app to the encrypted volume
3. Create an alias on the Desktop or Applications folder

This method is clunky and breaks app updates, Spotlight search, and Dock integration. Plus, it's easily bypassed by anyone who knows where to look.

Method 3: Dedicated App Protection Software

The most practical solution is using dedicated software designed for app protection. Here's what's available:

Free/Basic Options

AppLocker is the most basic option, but it hasn't been updated in years and uses outdated security methods. The interface feels stuck in 2015, and it doesn't support Touch ID.

AppCrypt ($29.99) offers password-based protection but requires typing a password every time. No Touch ID integration, which defeats the convenience factor on modern Macs.

Modern Touch ID Solutions

Lockish provides Touch ID-based app protection designed for convenience rather than enterprise security:

• Touch ID Integration: Uses your Mac's built-in biometric authentication
• Complete Lock Overlay: Hides app content entirely when locked
• Automatic Idle Locking: Apps lock themselves after configurable timeouts (10 seconds to 60 minutes)
• Multi-Window Support: Handles apps with multiple windows across monitors
• Quit Protection: Requires Touch ID to quit Lockish or remove protected apps

The app requires macOS 14+ and Accessibility permissions to monitor app switching.

How App Locking Actually Works

App protection software doesn't modify the actual applications. Instead, it:

1. Monitors app launches using macOS accessibility APIs
2. Overlays a lock screen when protected apps become active
3. Requires authentication before removing the overlay
4. Tracks idle time to automatically re-lock apps

This approach means your apps remain unchanged, updates work normally, and the protection can be easily removed if needed.

What App Locking Can and Can't Do

Good for:

• Preventing casual access when you step away from your desk
• Keeping family members out of work apps
• Adding privacy layers for sensitive applications
• Quick protection without full screen lock

Not suitable for:

• Protecting against determined attackers with admin access
• Enterprise-level security requirements
• Preventing access to app data files (only the app interface is locked)

Setting Up App Protection

Regardless of which solution you choose, follow these best practices:

1. Start with your most sensitive apps: Banking, password managers, email
2. Configure reasonable timeouts: Too short and you'll get annoyed, too long defeats the purpose
3. Test multi-window scenarios: Make sure protection works across all your monitors
4. Keep your main authentication method secure: Touch ID is only as secure as your Mac's login

The Bottom Line

macOS's lack of built-in app locking is frustrating, but third-party solutions fill the gap effectively. For most users, Touch ID-based protection offers the best balance of security and convenience.

Screen Time restrictions work for basic parental controls, but aren't practical for personal productivity. Manual disk image encryption is too cumbersome for daily use.

If you frequently share your Mac or work in environments where screen privacy matters, dedicated app protection software is worth the investment for peace of mind and convenience.