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MountGuard

One button. Total silence.
Your network security software cannot see what plugs into your USB port. MountGuard can. When protection is enabled, no removable storage device mounts on your Mac. Not a USB drive. Not an SD card. Not an external SSD. The moment you step away, your data stays exactly where it is.
Coming soon for macOS

One toggle. Complete physical access control.

Block Storage

One toggle blocks all removable storage from mounting. Enable it and no USB drive, SD card, or external SSD can connect to your Mac.

Auto-Restore Timer

Need to allow a device temporarily? Set a timer from 5 minutes to 2 hours. When it expires, protection re-enables automatically.

Event Log

Every mount attempt, block event, and state change is logged with a timestamp. Export as plain text or clear at any time.

PIN Protection

Set a numeric PIN to prevent protection from being disabled or MountGuard from being quit by anyone with brief physical access.

System Notifications

Get a notification every time a drive is detected and ejected. Always know when something attempted to connect, even when away from your screen.

Launch at Login

Enable Launch at Login and MountGuard starts automatically after every restart. Your Mac is protected from the moment it boots.

Install once. Step away with confidence.

01

Install and launch

MountGuard installs via PKG installer and places a shield icon in your menu bar. No dock icon. No main window.
02

Enable protection

Click the menu bar icon and toggle Block Storage on. The icon and status card turn blue. All removable storage is now blocked.
03

Set your PIN

Open Settings and set a numeric PIN. This prevents anyone with brief physical access from simply turning protection off.
04

Work normally

Your keyboard, mouse, audio interface, and display keep working. Only removable storage is blocked. Everything else is unaffected.

MountGuard blocks storage. Nothing else.

What MountGuard blocks

  • USB drives and flash storage
  • External HDDs and SSDs
  • SD cards and card readers
  • Thunderbolt storage devices

What MountGuard does not block

  • Keyboards and mice
  • Audio interfaces and webcams
  • Thunderbolt displays and docks
  • iPhone and iPad connections
  • USB charging cables with no storage