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Find the MAC Address on an Apple Device with OS X At times, you may need to identify a device that has been registered to your Xfinity account by finding the device's Media Access Control (MAC) address. This article explains how to locate your MAC address on an Apple computer with OS X. Locate the MAC Address of an Apple Computer with OS X. For Mac OS January 06, 2021 20:01; Updated; Macintosh Computer Requirements. If you access the Xfinity Stream portal on a Macintosh computer (Mac), your Mac must meet the following minimum requirements. Intel Core Duo 1.83 GHz or faster processor; 256.

If you've followed the steps to connect your Mac to a Wi-Fi network, but the connection to your network or the Internet isn't reliable, the steps in this article might help.

Check for Wi-Fi recommendations

When your Mac tries to connect to a Wi-Fi network, it checks for issues that affect its ability to create a fast, stable, and secure connection. If an issue is detected, the Wi-Fi status menu in the menu bar shows a new item: Wi-Fi Recommendations. Choose it to see recommended solutions.

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Wi-Fi recommendations are available in macOS Sierra or later.

Analyze your wireless environment

Your Mac can use Wireless Diagnostics to perform additional analysis.

  1. Quit any apps that are open, and connect to your Wi-Fi network, if possible.
  2. Press and hold Option (Alt) ⌥ key, then choose Open Wireless Diagnostics from the Wi-Fi status menu .
  3. Enter your administrator name and password when prompted.

Wireless Diagnostics begins analyzing your wireless environment:

If the issue is intermittent, you can choose to monitor your Wi-Fi connection:


When you're ready to see recommendations, continue to the summary. Wireless Diagnostics asks for optional information about your base station or other router, so that it can include that in the report it saves to your Mac.

Click the info button next to each item in the summary to see details about that item. Wi-Fi best practices are tips that apply to most Wi-Fi networks.


Back up or make note of your network or router settings before changing them based on these recommendations—in case you need to use those settings again.

Monitor your Wi-Fi connection

Your Mac can monitor your Wi-Fi connection for intermittent issues, such as dropped connections. Follow the steps to analyze your wireless environment, but choose ”Monitor my Wi-Fi connection” when prompted.

During monitoring, a window shows that monitoring is in progress. Monitoring continues as long as this window is open and you're on the same Wi-Fi network, even when your Mac is asleep.

If Wireless Diagnostics finds an issue, it stops monitoring and shows a brief description of the issue. You can then resume monitoring or continue to the summary for details and recommendations.

Create a diagnostics report

Wireless Diagnostics automatically saves a diagnostics report before it displays its summary. You can create the same report at any time: press and hold the Option key, then choose Create Diagnostics Report from the Wi-Fi status menu . It can take your Mac several minutes to create the report.

  • macOS Sierra and later saves the report to the /var/tmp folder of your startup drive, then opens that folder for you.
    To open the folder manually, choose Go > Go to Folder from the Finder menu bar, then enter /var/tmp.
  • OS X El Capitan or earlier saves the report to your desktop.

The report is a compressed file with a name that begins “WirelessDiagnostics.” It contains many files that describe your wireless environment in detail. A network specialist can examine them for further analysis.

Use other diagnostics utilities

Wireless Diagnostics includes additional utilities for network specialists. Open them from the Window menu in the Wireless Diagnostics menu bar:

  • Info gathers key details about your current network connections.
  • Logs enables background logging for Wi-Fi and other system components. The result is saved to a .log file in the diagnostics report location on your Mac. Logging continues even when you quit the app or restart your Mac, so remember to disable logging when you're done.
  • Scan finds Wi-Fi routers in your environment and gathers key details about them.
  • Performance uses live graphs to show the performance of your Wi-Fi connection:
    • Rate shows the transmit rate over time in megabits per second.
    • Quality shows the signal-to-noise ratio over time. When the quality is too low, your device disconnects from the Wi-Fi router. Factors that affect quality include the distance between your device and the router, and objects such as walls that impede the signal from your router. Learn more.
    • Signal shows both signal (RSSI) and noise measurements over time. You want RSSI to be high and noise to be low, so the bigger the gap between RSSI and noise, the better.
  • Sniffer captures traffic on your Wi-Fi connection, which can be useful when diagnosing a reproducible issue. Select a channel and width, then click Start to begin capturing traffic on that channel. When you click Stop, a .wcap file is saved to the diagnostics report location on your Mac.

Learn more

Additional recommendations for best Wi-Fi performance:

  • Keep your router up to date. For AirPort Time Capsule, AirPort Extreme, or AirPort Express Base Station, check for the latest firmware using AirPort Utility. For non-Apple routers, check the manufacturer's website.
  • Set up your router using Apple's recommended settings, and make sure that all Wi–Fi routers on the same network use similar settings. If you're using a dual-band Wi-Fi router, make sure that both bands use the same network name.
  • Learn about potential sources of Wi-Fi and Bluetooth interference.

Learn about other ways to connect to the Internet.

Get started

Make sure that your devices meet the requirements for using AirPlay. To use Siri to play and control video from your iPhone, iPad, or iPod touch, add your Apple TV or AirPlay 2-compatible smart TV to the Home app and assign it to a room.

Stream video from your iPhone, iPad, or iPod touch

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  1. Connect your device to the same Wi-Fi network as your Apple TV or AirPlay 2-compatible smart TV.
  2. Find the video that you want to stream.
  3. Tap . In some third-party apps, you might need to tap a different icon first.* In the Photos app, tap , then tap .
  4. Choose your Apple TV or AirPlay 2-compatible smart TV. Need help?

To stop streaming, tap in the app that you're streaming from, then tap your iPhone, iPad, or iPod touch from the list.

*Some video apps might not support AirPlay. If you can’t use AirPlay with a video app, check the App Store for tvOS to see if that app is available on Apple TV.

If video automatically streams to an AirPlay device

Your device might automatically stream video to the Apple TV or AirPlay 2-compatible smart TV that you frequently use. If you open a video app and see in the upper-left corner, then an AirPlay device is already selected.

To use AirPlay with a different device, tap, then tap another device, or tap 'iPhone' to stop streaming with AirPlay.

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Stream video from your Mac

  1. Connect your Mac to the same Wi-Fi network as your Apple TV or AirPlay 2-compatible smart TV.
  2. On your Mac, open the app or website that you want to stream video from.
  3. In the video playback controls, click .
  4. Select your Apple TV or smart TV. Need help?

To stop streaming video, click in the video playback controls, then choose Turn Off AirPlay.

Mirror your iPhone, iPad, or iPod touch

Use Screen Mirroring to see the entire screen of your iPhone, iPad, or iPod touch on your Apple TV or AirPlay 2-compatible smart TV.

  1. Connect your iPhone, iPad, or iPod touch to the same Wi-Fi network as your Apple TV or AirPlay 2-compatible smart TV.
  2. Open Control Center:
    • On iPhone X or later or iPad with iPadOS 13 or later: Swipe down from the upper-right corner of the screen.
    • On iPhone 8 or earlier or iOS 11 or earlier: Swipe up from the bottom edge of the screen.
  3. Tap Screen Mirroring.
  4. Select your Apple TV or AirPlay 2-compatible smart TV from the list. Need help?
  5. If an AirPlay passcode appears on your TV screen, enter the passcode on your iOS or iPadOS device.

Your TV uses your iOS or iPadOS device's screen orientation and aspect ratio. To fill your TV screen with the mirrored device screen, change your TV's aspect ratio or zoom settings.

To stop mirroring your iOS or iPadOS device, open Control Center, tap Screen Mirroring, then tap Stop Mirroring. Or press the Menu button on your Apple TV Remote.

Mirror or extend your Mac display

With Apple TV or an AirPlay 2-compatible smart TV, you can mirror the entire display of your Mac to your TV or use your TV as a separate display.

  1. Connect your Mac to the same Wi-Fi network as your Apple TV or AirPlay 2-compatible smart TV.
  2. On your Mac, click in the menu bar at the top of your screen. If you don't see , go to Apple  menu > System Preferences > Displays, then select 'Show mirroring options in the menu bar when available.'
  3. Choose your Apple TV or AirPlay 2-compatible smart TV. Need help?
  4. If an AirPlay passcode appears on your TV screen, enter the passcode on your Mac.

Change settings or stop mirroring

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To change the size of your desktop mirrored on your TV, click in the menu bar. Then select Mirror Built-in Display to match the size of your desktop or Mirror Apple TV to match the size of your TV.

AirPlay also lets you use your TV as a separate display for your Mac. Just click in the menu bar, then select Use As Separate Display.

To stop mirroring or using your TV as a separate display, click in the menu bar, then choose Turn AirPlay Off. Or press the Menu button on your Apple TV Remote.

Learn more about mirroring or extending the display of your Mac.

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Do more with AirPlay

  • Use Siri on your iPhone, iPad, or iPod touch to play movies and TV shows, and control playback on your Apple TV or AirPlay 2-compatible smart TV.
  • Use AirPlay to stream music, podcasts, and more to your Apple TV, HomePod, or other AirPlay-compatible speakers.
  • Add your AirPlay 2-compatible speakers and smart TVs to the Home app.
  • Learn what to do if you can't stream content or mirror your device's screen with AirPlay.