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

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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