Getting a laptop screen onto a TV should be a two-minute job, and it usually is once you know which of the four routes your TV actually supports. The confusion comes from the fact that Google Cast, Miracast and AirPlay all look the same from the sofa but are entirely separate systems that do not talk to each other.
This guide covers sending from a Windows laptop or a Mac to a TV: casting from Chrome, Miracast over Windows + K, AirPlay from macOS, the streaming boxes that add the ability, and the HDMI cable that beats all of them when the Wi-Fi is bad.
What’s Inside
- 1 – Casting Versus Mirroring, and Why the Difference Matters
- 2 – What Changed Since This Guide Was Written
- 3 – Casting From Chrome to a TV
- 4 – Mirroring From Windows 11 With Miracast
- 5 – AirPlay From a Mac to a TV
- 6 – Streaming Boxes and Adapters That Add Casting
- 7 – The HDMI Cable Route
- 8 – Final Thoughts on Casting a Laptop to Your TV
Casting Versus Mirroring, and Why the Difference Matters
These two words get used interchangeably and they describe different things. Which one you want changes which method you should pick.
- Casting hands the content over. You tell the TV what to play, the TV fetches and plays it, and the laptop is then free — you can close the lid or use another app without interrupting playback.
- Mirroring duplicates the laptop’s display on the TV in real time. Whatever is on your screen is on the TV, including notifications, and the laptop has to keep sending the whole time.
For a film on a streaming service, casting is better — smoother picture, laptop free, less battery drain. For a slide deck, a spreadsheet or anything where you need to see exactly what the audience sees, mirroring is what you want.
This article is about sending from a laptop to a TV. Making a Windows PC receive a cast from a phone is a different job that needs the Wireless Display optional feature installed first. That is documented separately in our guide to casting a phone onto a laptop screen, and nothing below requires it.
What Changed Since This Guide Was Written
The biggest shift is the hardware. Google ended production of the Chromecast line in August 2024 after eleven years and replaced it with the Google TV Streamer. Existing Chromecasts still work and still receive updates.
Google Cast itself did not go anywhere. It is built into a large number of TVs and streaming devices, so on most sets bought in the last few years you do not need a dongle at all — the receiver is already inside the TV. AirPlay 2 has spread the same way across Samsung, LG, Sony and Vizio sets.
Windows also moved. Casting from Windows 11 is no longer buried in a Devices page in Settings; it is a keyboard shortcut and a Quick Settings tile. The Windows 10 route in the previous version of this article no longer matches what is on screen, and Windows 10 itself is past its end-of-support date.
Casting From Chrome to a TV
This is the route with the widest reach, because it works identically from Windows, macOS, Linux and ChromeOS, and it targets anything with Google Cast built in. Both the laptop and the TV need a strong connection to the same Wi-Fi network.
- Turn the TV on and switch it to its home screen. The receiver has to be awake to appear in the list.
- In Chrome, open the menu at the top right and choose Cast, save, and share then Cast.
- Pick your TV from the list of devices found on the network.
- To send the whole desktop rather than just the browser tab, open Sources in that same panel and choose Cast screen before selecting the device.
- To stop, select the Cast icon beside the address bar and choose Stop casting.
Two behaviors are worth having straight before you start. Casting a tab sends its audio to the TV only, so the laptop goes quiet; casting the whole screen may instead leave the audio playing on the computer. And whatever the TV was already playing is replaced by your cast.
You can also play a local video or music file this way: press Ctrl + O (or Cmd + O on a Mac) to open the file in Chrome, then cast it. Chrome will not cast content that relies on plugins such as Silverlight, QuickTime or VLC.
Mirroring From Windows 11 With Miracast
Miracast is a Wi-Fi Alliance standard that creates a direct link between laptop and display, so it does not strictly need a router between them. It is built into Windows, and into many smart TVs under names like Screen Mirroring, Screen Share or SmartShare.
- On the TV, open its screen-mirroring feature so it is listening. On some sets this is an input source; on others it is an app.
- On the laptop, press Windows + K and select the display you want to cast to from the list of available devices.
- Follow any prompt that appears — some TVs show a PIN that has to be typed on the laptop.
- Press Windows + P to switch between duplicating your screen and extending onto the TV as a second desktop.
If Windows + K opens the panel but finds nothing, the usual causes are the TV not being in mirroring mode, the laptop’s Wi-Fi adapter or graphics driver not supporting Miracast, or a work laptop where the feature is disabled by policy. Older machines upgraded from a previous Windows version are the most common failures.
Extending onto the TV rather than duplicating is genuinely useful for presenting — the audience sees the slides while you keep your notes on the laptop. The same layout controls described in our guide to arranging multiple displays apply to a TV as they do to a monitor.
AirPlay From a Mac to a TV
Macs do not support Miracast. Their route is AirPlay, which targets an Apple TV or any TV with AirPlay 2 built in — a group that now includes many Samsung, LG, Sony and Vizio models. The Mac and the TV need to be on the same Wi-Fi network.
- Open Control Center from the right of the menu bar.
- Select Screen Mirroring.
- Choose your Apple TV or AirPlay-compatible TV from the list.
- If the TV displays a passcode, type it on the Mac.
- In the same Screen Mirroring panel, choose whether to mirror the built-in display or use the TV as a separate display.
Individual apps often have their own AirPlay button in the playback controls. Using that sends the video directly to the TV at full quality rather than mirroring a scaled copy of your screen, which is the better option for watching anything.
Streaming Boxes and Adapters That Add Casting
If the TV is older and supports none of the above, a device plugged into an HDMI port adds the receiver. Check what each one actually accepts before buying, because they do not all speak every protocol.
- Google TV Streamer. Google’s current device, introduced in August 2024 as the Chromecast replacement. Receives Google Cast, so it covers the Chrome route above.
- Apple TV 4K. The AirPlay receiver for Macs, iPhones and iPads. No Miracast.
- Roku devices. Support both Miracast for Windows mirroring and AirPlay 2 on current models, which makes them unusually flexible for a mixed household.
- Amazon Fire TV sticks. Support Miracast mirroring from Windows and Android. No Google Cast.
- Generic Miracast dongles. Cheap and inconsistent. The Microsoft Wireless Display Adapter that the earlier version of this guide recommended has been discontinued and is not worth chasing down secondhand.
The HDMI Cable Route
A cable is still the most reliable method and the only one with no lag worth mentioning. For gaming, for a presentation you cannot afford to have drop out, or for any room with congested Wi-Fi, it is the right answer.
- Connect an HDMI cable between the laptop and the TV. On a laptop with only USB-C, use a USB-C to HDMI adapter — and check the port carries video, since not all USB-C ports do.
- Switch the TV to that HDMI input using its source button.
- Press Windows + P and choose Duplicate or Extend. On a Mac, open System Settings > Displays.
- If sound stays on the laptop, right-click the volume icon, open Sound settings and select the TV as the output device. HDMI carries audio, but Windows does not always switch to it automatically.
VGA still appears in older guides as an option. It carries no audio, so it needs a separate 3.5mm cable, and it is analog — the picture is visibly worse. Treat it as a last resort on genuinely old equipment.
Casting a video call does not move the microphone. Mirroring a Zoom or Teams window puts the picture on the TV, but the audio input stays with the laptop’s microphone. If you are calling from across the room, you still need a mic that reaches you.
What is the difference between screen casting and screen mirroring?
Casting hands the content to the TV, which fetches and plays it while the laptop is free to do something else. Mirroring duplicates the laptop’s display in real time, so the laptop must keep sending continuously and everything on your screen appears on the TV.
Do I still need a Chromecast to cast from a laptop?
Usually not. Google Cast is built into many TVs and streaming devices, so the receiver is already there. Google ended Chromecast production in August 2024 and replaced it with the Google TV Streamer; existing Chromecasts continue to work.
How do I cast from a Windows 11 laptop to a TV?
Put the TV into its screen-mirroring mode, then press Windows + K on the laptop and select the TV from the list. Windows + P then switches between duplicating your screen and extending onto the TV.
Why does Windows + K not find my TV?
The most common causes are the TV not being in mirroring mode, a Wi-Fi adapter or graphics driver that does not support Miracast, the two devices being on different networks or bands, or a managed work laptop with the feature switched off by policy.
Can I cast from a MacBook to a smart TV?
Yes, via AirPlay to an Apple TV or an AirPlay 2-compatible TV. Open Control Center, select Screen Mirroring and pick the TV. Macs do not support Miracast, so a Miracast-only dongle will not work with them.
Do the laptop and TV need to be on the same Wi-Fi network?
For Google Cast and AirPlay, yes — Google’s guidance specifies a strong connection to the same network on both. Miracast creates a direct device-to-device link, so it can work without a shared network, though it is still fussy about drivers.
Why is there no sound on the TV over HDMI?
Windows has not switched audio output. Right-click the volume icon, open Sound settings and select the TV as the output device. Over VGA there is no fix — VGA carries video only, so a separate audio cable is required.
Which method is best for gaming or a live presentation?
An HDMI cable. Every wireless method adds compression and latency, and Wi-Fi congestion causes stutter at exactly the wrong moment. Wireless is fine for films and photos, where a fraction of a second of delay does not matter.
Final Thoughts on Casting a Laptop to Your TV
Start by finding out which receiver your TV already has, because that single fact picks the method for you — Chrome’s cast menu for Google Cast, Windows + K for Miracast, Control Center for AirPlay. Keep an HDMI cable in the drawer for the times the Wi-Fi is not cooperating and the room is waiting.
