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If your Mac is shared at home, private apps stay covered until you unlock with Touch ID or password.
Ideal for family computers and shared spaces.
🔐 Native macOS App
Block any App.
Protect your Privacy.
Lock and cover private apps on Mac with Touch ID or a master password. If someone gets curious, NanoLocker blocks access instantly.
🚀 SwiftUI Native
👤 Intruder Selfies
💥 Camouflage Mode
Join the Beta Waitlist
Coming Soon to App Store
No signup. No tracking. Early beta capacity is intentionally limited.
More than just a blocker
Engineering-first approach to security and privacy.
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Native Touch ID
Unlock your apps as fast as you unlock your Mac. Deep integration with the Secure Enclave.
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System Level
NanoLocker places a secure cover over protected apps and blocks interaction until you authenticate.
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Pro
Camouflage Mode
Throw them off the scent. Instead of a lock screen, NanoLocker simulates a realistic system error. "The application quit unexpectedly." Curious eyes will just think your Mac is acting up.
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Pro
Intruder Selfies
Someone trying to guess your password? We snap a silent photo and save it to your local gallery.
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Ghost Mode
Hides apps rather than quitting them. Music keeps playing, downloads keep running.
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100% Local
No accounts, no tracking. Your settings and photos never leave your machine.
Built for real life: home and work
NanoLocker is personal-first: family, roommates, friends, partners, curious visitors, and also shared Macs at work or coworking.
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When a friend, partner, coworker, or nosy person grabs your Mac for a minute, protected apps remain hidden behind a secure overlay.
No awkward explanations and no manual app closing.
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Protection is instant: NanoLocker covers the app first, then asks for Touch ID or your master key.
Fast for everyday flow, strong for private apps at home and work.
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Privacy Commitment
NanoLocker follows the "Privacy by Design" principle. We don't use analytics servers or upload your data to the cloud. Your purchase is handled directly and securely by Apple via the App Store.
✅ No Signup
✅ No Analytics
✅ No File Access
FAQ: App Lock for Mac
Answers to the most searched questions about locking apps on macOS.
How do I lock apps on Mac?
Install NanoLocker, pick the apps you want to protect, and unlock each one using Touch ID or a master password.
Does macOS include built-in app lock?
Not for all apps. NanoLocker adds per-app protection so you can lock sensitive apps individually.
Can I lock WhatsApp, Notes, and Mail on macOS?
Yes. NanoLocker is designed for private apps like messaging, notes, email, and other sensitive tools.
Does NanoLocker upload my photos or settings?
No. NanoLocker stores settings and intruder selfies locally on your Mac.
Why use Fake Crash mode?
It simulates a system error instead of a lock prompt, which reduces attention from curious people nearby.