Modern multimedia systems make it easy to display content from your computer on a large screen, but Apple users often encounter compatibility issues. If you're looking for a way to stream content from your iMac to your TV via Wi-Fi, you don't need HDMI cables or complicated adapters. Wireless technologies have come a long way, offering stable, high-definition video streaming.
The main tool for Apple technology owners is technology AirPlay, built into the macOS operating system. However, not all TVs support this protocol natively, requiring additional solutions or third-party apps. In this article, we'll explore all available methods, from built-in tools to specialized software that ensures minimal latency.
Before you begin setup, please make sure your hardware meets the minimum requirements. iMac The TV must be manufactured no earlier than 2011 (for some models) or support AirPlay 2, and the TV must be connected to the same local network. Streaming quality directly depends on your router's bandwidth and signal stability.
Using the built-in AirPlay 2 feature
The easiest and most reliable way to mirror your screen is available to owners of TVs that support AirPlay 2This technology allows you to transfer videos, photos, and even your entire desktop without loss of quality. No additional software installation is required to get started, as all the necessary components are already built into macOS.
Make sure yours is Smart TV The iMac and the TV are on the same subnet. If you're using a guest Wi-Fi network or isolated VLANs on a corporate router, the devices may not be able to see each other. Enable AirPlay in your TV settings; it may be called "Apple AirPlay," "Screen Share," or "HomeKit."
- 📺 On your TV remote, press the Source/Input button and find the AirPlay option.
- 🍎 On an iMac, in the menu bar (at the top of the screen), click the "Control Center" icon (two switches).
- 🖥 Select "Screen Mirroring" and click on your TV's name in the list.
- 🔒 If a code appears on the TV screen, enter it in the corresponding field on your computer to confirm pairing.
⚠️ Note: When connecting for the first time, a permissions request may appear on the TV screen. Be sure to confirm this action using the remote control, otherwise the connection will not be established.
Once successfully connected, the image from your iMac monitor will be mirrored to your TV. You can work in any application, and everything will be displayed on the big screen. To control the resolution or orientation, go to System Preferences → DisplaysHere you can select the operating mode: mirroring or using the TV as a separate monitor.
Setting up AirPlay on Samsung, LG and Sony TVs
TV manufacturers implement support for Apple protocols in different ways. On models Samsung (QLED, The Frame, Crystal UHD series) the function is built into the Tizen firmware. On TVs LG With webOS OS, support is also present natively. Sony and other brands with Android TV, the situation may vary depending on the year of the model.
To activate the feature on a Samsung, you need to go to the settings menu using the remote control. Find the section General → Apple AirPlay Settings and turn the switch to the "On" position. Similar steps are required for LG: Settings → Connection → AirPlay and HomeKitIt is important that your TV software is updated to the latest version.
☑️ Check TV readiness
In some cases, automatic detection may fail due to router security settings. Make sure the "AP Isolation" feature is disabled on your router, which prevents devices within the network from communicating with each other. Without this step, the iMac will physically be unable to send a data packet to the TV.
Alternative methods: Google Chromecast and third-party apps
If your TV doesn't natively support AirPlay, but has a built-in Chromecast or runs Android TV, you're not stuck. You can use the Google Chrome browser or specialized screen mirroring utilities. This is a universal method that works on virtually any modern Smart TV.
To stream using the Chrome browser, open the app on your iMac. Click the three-dot menu in the upper right corner and select Broadcast... (Cast). In the window that opens, select "Cast desktop" and select your device. Image quality may be slightly lower than with native AirPlay, but functionality remains.
There are also free and paid apps that install a signal reception server on your TV. Popular solutions include AirBeamTV or ReflectorThey create a virtual receiver that macOS sees as a standard Apple device.
- 📡 Install the receiver application on your TV through the app store (Google Play Store, LG Content Store).
- 🔗 Launch the app on your TV and wait for the IP address or device name to appear.
- 💻 On your iMac, select the discovered device from the AirPlay menu.
- 🎞 Enjoy streaming video with minimal lag.
⚠️ Please note: Third-party apps may put additional strain on your TV's processor, which can cause the device to overheat or cause image stuttering during heavy scenes.
Impact of codecs on quality
When using third-party apps, it's important to consider the default compression codec. H.264 provides better compatibility, but HEVC (H.265) offers better quality at a lower bitrate but requires more powerful hardware for real-time decoding.
Transmission technology compatibility table
To help you navigate the connection methods, we've prepared a summary table. It will help you determine the best method for your equipment setup.
| TV type | Native AirPlay | Chromecast built-in | Recommended method |
|---|---|---|---|
| Samsung (2018+) | Yes | No | AirPlay 2 |
| LG (webOS 4.0+) | Yes | No | AirPlay 2 |
| Sony (Android TV) | Depends on the model | Yes | Chrome Cast / AirPlay |
| Old Smart TVs | No | No | Third-party applications |
As you can see from the table, modern models are almost completely compatible with the Apple ecosystem. However, if you have an older model, released before 2016-2017, you'll likely need to install additional software receivers.
Troubleshooting connection and lag issues
Even with proper setup, users may experience audio and video desynchronization or intermittent connection drops. Most often, the problem stems from wireless congestion or insufficient router signal strength.
Try switching your router to the 5 GHz band. The 2.4 GHz band is often clogged with signals from neighboring networks and Bluetooth devices, causing interference. Channel stability is critical for transmitting high-definition video (4K HDR).
It's also worth checking your macOS firewall settings. Go to System Preferences → Security & Privacy → FirewallMake sure that incoming connection blocking is not enabled for system services. Sometimes third-party antivirus software can also block local traffic.
If the image is choppy, try lowering the output resolution. In the menu Displays Select a lower resolution or reduce the refresh rate. This will reduce the load on the network and the TV's processor.
Using HDMI adapters as an alternative
Although this article focuses on wireless technologies, physical connections shouldn't be ignored when maximum reliability is needed. If your Wi-Fi network is unstable, using an adapter USB-C to HDMI or Thunderbolt to HDMI guarantees signal transmission without compression artifacts.
Modern adapters support 4K audio and video at 60 frames per second. This is ideal for watching high-bitrate movies or giving presentations where cursor lag is unacceptable.
- 🔌 Connect the adapter to the Thunderbolt 3/4 port on your iMac.
- 📺 Connect the adapter and TV with an HDMI cable (preferably version 2.0 or 2.1).
- ⚙️ Select the appropriate HDMI input on your TV.
- 🖥 Adjust the display mode in macOS System Preferences.
Keep in mind that using long HDMI cables (over 3-5 meters) without active amplification can degrade the signal. In such cases, it's best to use a high-quality HDMI-certified cable or switch to wireless if the distance is long.
Frequently Asked Questions (FAQ)
Why isn't my TV showing up in the AirPlay list on my Mac?
Most likely, the devices are on different Wi-Fi networks or client isolation is enabled on the router. Also, check whether your antivirus or firewall is blocking local device discovery.
Is it possible to transmit audio separately, without video?
Yes, in macOS you can select your TV as the audio output device. To do this, click the speaker icon in the menu bar or select TV in System Preferences → Sound → Output.
Does image transmission affect internet speed?
Yes, transmitting a video stream over Wi-Fi consumes a significant portion of the local network's bandwidth, which can reduce the file download speed on other devices connected to the same router.
Does AirPlay work over a guest Wi-Fi network?
Usually not. Guest networks isolate devices from each other for security purposes. For AirPlay to work, both devices must be on the primary network.
How do I remove the cursor lag when using Mac on TV?
Lag is inevitable with wireless transmission. For gaming or graphics work, it's best to use an HDMI cable. Switching your router to the 5 GHz channel and closing background downloads will also help.