Wi-Fi Error: Wi-Fi: No Hardware Installed (macOS) — What It Means & How to Fix It

What Does This Error Mean?

This macOS error means your Mac cannot detect its own Wi-Fi hardware. The Wi-Fi card appears to be missing or not responding. It is usually a software or settings issue — not actual hardware failure — and often fixes itself with a restart or a network settings reset.

Affected Models

macOS Ventura
macOS Monterey
macOS Big Sur
macOS Catalina
MacBook Air
MacBook Pro
iMac

Common Causes

A corrupted network preferences file is preventing macOS from recognizing the Wi-Fi card
The Mac woke from sleep and the Wi-Fi hardware failed to reinitialize
A recent macOS update changed system files that affect Wi-Fi recognition
The System Management Controller (SMC) has a stuck configuration
In rare cases, the Wi-Fi card is physically loose or has failed (more common in older Macs)

How to Fix It

Restart your Mac. Many users find the error disappears completely after a simple restart, especially if it appeared after waking from sleep.

This is the fastest first step — do not skip it.
Delete the Wi-Fi network preferences file. Open Finder > Go > Go to Folder and type: /Library/Preferences/SystemConfiguration/ — Delete these files: com.apple.airport.preferences.plist — com.apple.network.identification.plist — com.apple.wifi.message-tracer.plist — Restart your Mac.

These files store Wi-Fi settings. Deleting them forces macOS to rebuild them fresh. You will need to rejoin your Wi-Fi networks.
Reset the SMC (System Management Controller). For MacBooks with Apple Silicon (M1/M2), simply shut down and restart — SMC is handled automatically. For Intel MacBooks, shut down, hold Shift + Control + Option + Power for 10 seconds, release, then start up.

The SMC controls hardware power states. Resetting it can restore Wi-Fi card recognition.
Reset NVRAM/PRAM. Shut down your Mac. Press the power button, then immediately hold Option + Command + P + R for 20 seconds until you hear the startup sound twice.

NVRAM stores hardware settings. Resetting it can fix Wi-Fi recognition issues. This only applies to Intel Macs.
Run Apple Diagnostics to test the Wi-Fi hardware. Shut down your Mac, then hold D while pressing the power button. Let the test run to completion and check for Wi-Fi hardware errors.

If Apple Diagnostics reports a hardware failure code, the Wi-Fi card needs physical repair or replacement.

When to Call a Professional

If you have tried all the software fixes and the error persists after a clean macOS reinstall, the Wi-Fi card may have physically failed. Take your Mac to an Apple Store or Apple Authorized Service Provider. Apple can run hardware diagnostics and replace the Wi-Fi card. Repairs typically cost $200–$400 out of warranty.

Frequently Asked Questions

Did my Wi-Fi card just die, or is this a software problem?

In most cases it is software. The error commonly appears after sleep, after an update, or when preferences files become corrupted. Try the software fixes first — they work for the majority of users. If the error persists after deleting preferences files and resetting the SMC, then hardware failure becomes more likely.

Will deleting the .plist files erase my saved Wi-Fi passwords?

Your Wi-Fi passwords are stored in Keychain, not in those preference files. Deleting the .plist files will make your Mac forget which networks to join automatically, but the passwords are still saved. You will just need to manually join your home network again.

My Mac is only two years old. Can the Wi-Fi card really fail that quickly?

Hardware failure at two years is uncommon but possible. However, most cases of this error on newer Macs are software-related. Always exhaust the software fixes before assuming hardware failure. If your Mac is still under AppleCare, hardware repairs are covered at no charge.