Connecting your Mac to ethernet means plugging a cable directly into your computer instead of using Wi-Fi

An ethernet connection is a physical cable that runs from your wall, router, or modem straight into your Mac. It is faster and more stable than Wi-Fi because the signal does not travel through air or walls — it moves through copper wire. Most Macs made after 2016 do not have a built-in ethernet port, so you will need an adapter. Older Macs (2015 and earlier) often have a port already.

Ethernet is useful when you are downloading large files, video conferencing, gaming, or doing work that needs a rock-solid connection. It also does not compete with other devices on your Wi-Fi network, so your internet speed stays consistent even when others are streaming or browsing.

Key Takeaways

  • Most modern Macs need a USB-C or Thunderbolt adapter to connect to ethernet, since they do not have a built-in port.
  • Once you plug in the adapter and cable, your Mac automatically detects the connection and switches to it — no settings to change.
  • Ethernet is faster and more reliable than Wi-Fi, especially for large downloads or video calls.
  • You can use ethernet and Wi-Fi at the same time; your Mac will prefer the wired connection.

Check what type of Mac you have and what port it uses

The first step is knowing which port your Mac has, because that determines which adapter you need. Open the Apple menu in the top left corner, click About This Mac, and look at the model name and year. If your Mac is from 2015 or earlier, it likely has a built-in ethernet port (called RJ-45) and you do not need an adapter at all — just plug the cable in.

If your Mac is from 2016 or later, it has either USB-C ports (on most MacBook Pro and MacBook Air models) or Thunderbolt ports (on newer models). Thunderbolt ports look identical to USB-C but are faster. Either way, you will need an adapter that converts one of these ports to ethernet. The adapter itself is small and inexpensive — usually between $15 and $30.

Buy the right adapter for your Mac

For USB-C or Thunderbolt Macs, you have two main options. A USB-C to ethernet adapter is the simplest choice — you plug it into any USB-C port, then plug the ethernet cable into the adapter. These work on any Mac with USB-C, including MacBook Air, MacBook Pro, Mac mini, and iMac models from 2016 onward.

A Thunderbolt dock is a larger device that sits on your desk and connects to one Thunderbolt port. It usually includes ethernet, USB ports, and sometimes HDMI or SD card slots. A dock is worth buying if you want to connect multiple devices at once, but if you only need ethernet, a straightforward adapter is cheaper and takes up less space.

Buy from a retailer that accepts returns, because some adapters work better than others depending on your specific Mac model. Apple's own adapters work reliably but cost more. Third-party brands like Anker, Belkin, and Cable Matters also make adapters that most users report work well.

Plug in the adapter and ethernet cable

Connect the adapter to an available USB-C or Thunderbolt port on your Mac. If you are using a straightforward adapter, plug the ethernet cable into the port on the adapter. If you are using a dock, plug the ethernet cable into the ethernet port on the dock. The other end of the ethernet cable goes into your router, modem, or wall outlet — wherever your internet connection comes from.

Your Mac will recognize the connection within a few seconds. You do not need to install drivers or change any settings. If you are currently on Wi-Fi, your Mac will automatically switch to ethernet and disconnect from Wi-Fi. You can see the connection status in the menu bar at the top right of your screen — it will show an ethernet icon instead of the Wi-Fi symbol.

Verify the connection is working

Open a web browser and visit any website to confirm you have internet access. If the page loads, your ethernet connection is working. You can also check the connection details by clicking the Wi-Fi icon in the menu bar (it may now show as an ethernet icon) and looking at the network name and signal strength.

If the page does not load, unplug the ethernet cable and plug it back in. Wait 10 seconds and try again. If it still does not work, restart your Mac. If you still have no connection, the cable itself may be damaged, or the port on your router or modem may not be working — try a different cable or a different port on the router.

Switch between ethernet and Wi-Fi

Your Mac can be connected to both ethernet and Wi-Fi at the same time. When both are available, your Mac automatically uses ethernet because it is faster and more stable. If you unplug the ethernet cable, your Mac will switch back to Wi-Fi without any action from you.

If you want to manually choose which connection to use, click the Wi-Fi icon in the menu bar and select Wi-Fi Options. From there you can turn Wi-Fi off entirely, or you can go to System Settings (or System Preferences on older Macs), click Network, and see both connections listed. You can also change the order your Mac prefers them by dragging them up and down in the list.

Troubleshoot if ethernet is not working

If your Mac does not recognize the adapter, try plugging it into a different USB-C or Thunderbolt port. Some ports on the same Mac may work differently, especially on models with multiple ports. Restart your Mac with the adapter plugged in — sometimes a restart is all that is needed.

If the adapter is recognized but you have no internet, the problem is usually not your Mac. Check that the ethernet cable is plugged firmly into both the adapter and the router or modem. Look for a light on the router or modem near the ethernet port — if there is no light, that port may not be active. Try unplugging the router for 30 seconds and plugging it back in. If you still have no connection, contact your internet provider to confirm the modem is working.

Frequently Asked Questions

Do I need to install anything to use ethernet on my Mac?

No. Your Mac recognizes ethernet adapters automatically and does not require drivers or software. Plug in the adapter, connect the cable, and your Mac will use it within seconds.

Can I use ethernet and Wi-Fi at the same time?

Yes. Your Mac can be connected to both, and it will automatically prefer ethernet because it is faster. When you unplug the ethernet cable, your Mac switches back to Wi-Fi without interrupting your work.

Is ethernet faster than Wi-Fi?

Ethernet is typically faster and more stable. Most ethernet connections run at 1 gigabit per second, while Wi-Fi speeds vary depending on your router and distance from it. Ethernet also has lower latency, which matters for video calls and gaming.

What if my Mac has a built-in ethernet port?

Older Macs (2015 and earlier) have a port built in. Just plug the ethernet cable directly into the port on the side of your Mac — no adapter needed. Your Mac will recognize it when ready.

Can I use any ethernet cable?

Any standard ethernet cable (Cat5e, Cat6, or Cat7) will work. Longer cables are fine too — ethernet does not degrade over distance the way Wi-Fi does. Buy a cable long enough to reach from your Mac to the router or wall outlet.