Plugged in a USB flash drive or external SSD, but nothing shows up?
Your Mac might not be reading the device — even though it’s connected.
This is a common macOS issue, often caused by a system-level glitch, power delivery bug, or a stuck USB service.
Fortunately, you can reset your Mac’s USB system using a Terminal command — no restart or formatting needed.
How to Reset USB Connections on macOS
1. Open Terminal
- Press Command (⌘) + Space
- Type Terminal and press Return
2. Paste and run this command
What This Command Does
- Restarts USB-related system services
- Forces macOS to reinitialize and remount connected devices
- Can fix missing drives in Finder, Disk Utility, or desktop
✅ USB Drive Reconnected!
Your drive should now appear normally.
Still not working? Try switching USB ports, cables, or repeat the command.
