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Guide to Using a Laptop as a Second Monitor for Windows, Mac, and Linux
Key points
- Laptops can function as second monitors.
- Methods vary for Windows, Mac, and Linux.
- Wireless casting (Miracast) is available for Windows.
- Wired HDMI connections are also an option.
Converting a Laptop into a Second Screen
Adding a second monitor can improve workflow for various tasks, including gaming, work, and web browsing. While mirroring displays is useful for presentations, extending the display provides more screen space for multitasking and productivity. This guide explains how to achieve a dual-monitor setup using an existing laptop instead of buying new hardware.
Setup Considerations
Converting a laptop into a second screen is not as simple as plugging in an HDMI cable. Users need to check compatibility, decide between wired and wireless options, and adjust system settings. The article outlines specific steps for Windows, Mac, and Linux operating systems, as well as wired HDMI connections.
Windows Laptop as a Second Monitor
For Windows 10 or 11, built-in wireless casting tools, which use Miracast, simplify the process. To set this up, navigate to Settings > System > Projecting to this PC on the spare laptop. Users must add the Wireless Display optional feature, set it to "Available everywhere," and open the Wireless Display app. On the main computer, pressing Windows key + K allows selection of the spare laptop, entering a PIN, and enabling keyboard/mouse input. Users can then choose to duplicate or extend the display, switching modes with Windows key + P. This method requires Wi-Fi on both devices and may introduce some lag.
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Reporting from
This article provides instructions on how to convert a laptop into a second monitor, detailing methods for Windows, Mac, and Linux operating systems. It covers both wireless casting options and wired HDMI connections, explaining the setup process for each. The guide helps users extend or mirror their primary display without purchasing new hardware.