Use your TV as a wireless second monitor for your laptop

Many Australians now split their week between a desk at the office and a kitchen bench at home, and finding room for a proper dual-monitor setup in a Sydney apartment or a Melbourne townhouse can be tricky. The spare television in the lounge room often sits unused for most of the day, so turning it into an extended desktop over Wi-Fi is a practical way to reclaim space without buying extra hardware.

The connection is usually quick, but the experience depends on your home network and the gear you already own. A stable NBN connection, a modern smart TV and a recent laptop are the main ingredients, and there are several wireless standards that make it possible.

Checking compatibility and what your setup needs

Before you start casting, confirm that both devices can talk to each other. Most TVs sold in Australia over the last five years include built-in support for at least one wireless display standard, whether that is Miracast, Chromecast or AirPlay. Cheaper models from brands like Hisense, TCL and Kogan often bundle Chromecast or AirPlay, while mid-range Samsung and LG sets usually support Miracast as well.

On the laptop side, Windows 10 and 11 include native projection tools, and modern Macs ship with AirPlay support. Your Wi-Fi matters more than people expect. Wireless display streaming runs much more smoothly on the 5 GHz band, and if your router is connected to the NBN through FTTP or HFC, you will usually have plenty of bandwidth for a clean 1080p signal. Older FTTN connections can be slower, but they still handle basic screen mirroring without trouble.

Casting from Windows with Miracast

Windows has included Miracast support for years, and most smart TVs from JB Hi-Fi, The Good Guys or your local Harvey Norman will pick it up automatically. Press Windows and K together on your keyboard to open the Connect panel, and your TV should appear in the list of available displays. Click on it, and within a few seconds your laptop screen will mirror onto the bigger display.

You can choose to mirror the same image on both screens or extend the desktop so the TV acts as a second monitor. Extending is more useful for productivity, letting you drag spreadsheets, browser windows or video calls onto the TV while keeping your laptop screen for messaging and notes. Miracast works without an internet connection because it creates a direct link between the two devices, which is handy if your household is sharing a limited NBN plan during peak evening hours.

Using Chromecast or a Google Cast-enabled TV

Chromecast is sold widely across Australia, from Officeworks and Big W to ALDI during their regular tech specials. If your TV already has Chromecast built in, you do not need any extra hardware. Open the Chrome browser on your laptop, click the three-dot menu, choose Cast, save and share, then select Cast desktop. Pick your TV from the list and your full desktop will appear on the screen.

For a more reliable experience, a Chromecast with Google TV device is worth considering, especially if you want to stream 4K content later. One advantage of this method is that you can keep working on your laptop while a video plays on the TV in the background, which is useful for households in Brisbane or Perth where multiple people share the same living space at different times of the day.

Streaming from macOS through AirPlay

If you are using a MacBook, AirPlay is usually the smoothest option. Open the Control Centre icon in the menu bar, click Screen Mirroring, and your compatible TV or Apple TV will appear in the list. Most smart TVs from Samsung, LG, Sony and Vizio sold in Australia now include AirPlay 2, so you may not need an Apple TV at all.

Once connected, your Mac treats the television as an external display. You can drag windows across to it, use it for a Zoom call, or play a presentation while keeping notes on the laptop screen. Latency is generally low, which makes AirPlay a good choice for editing documents or scrolling through long web pages without noticeable lag.

Tuning display settings for smooth performance

After you connect, spend a minute adjusting how Windows or macOS handles the second screen. In Settings, set the resolution to match your TV rather than relying on automatic scaling, because mismatched resolutions often cause blurry text. Lower the refresh rate to 30 Hz if you notice stuttering, as this reduces the strain on your Wi-Fi and is perfectly fine for spreadsheets, documents and casual browsing.

It is also worth checking how your TV behaves when idle. Australia's standby power regulations limit appliances to 2 watts or less in standby mode, and many modern sets switch themselves off after a short period of inactivity. If you plan to use your television as a monitor for several hours each day, turn off the automatic sleep timer so the screen does not cut out mid-task.

Method	Best for	Typical latency	Extra hardware needed	Typical cost in Australia
Windows Miracast	Windows laptops, no internet needed	Low	Usually none	Free
Chromecast	Chrome browsers, mixed use	Moderate	Chromecast dongle if TV lacks it	AUD 60 to 100
Apple AirPlay	macOS and iOS users	Low	Apple TV if TV lacks AirPlay	AUD 200 for Apple TV HD
Miracast adapter	Older TVs without smart features	Low	USB or HDMI adapter	AUD 40 to 80

Start with the method that matches the gear already in your home. For most Australians with a recent smart TV and a modern laptop, Windows projection or AirPlay will work out of the box without spending a cent, and you can upgrade to a dedicated streaming device later if you need better range or higher resolution. A quick test with the gear you already own will tell you whether your NBN plan, your router and your living room layout are ready for a wireless workstation before you spend any money.