How to share a mouse and keyboard across devices

Complete guide with multiple methods and troubleshooting.

7-10 min read
Expert Verified
Last Updated: August 2025

Quick Answer

Sharing a mouse and keyboard across multiple devices can be accomplished using software solutions or hardware devices like KVM switches. This allows users to control multiple computers with a single set of input devices, enhancing productivity and reducing clutter.

Medium⏱ 7-10 min read

Prerequisites & Requirements

Before attempting to share a mouse and keyboard across devices, ensure you have the following:
  • •Compatible operating systems: Windows 10/11, macOS, or Linux.
  • •Network connection for software solutions (Wi-Fi or Ethernet).
  • •Administrative access to install software if required.
  • •A KVM switch (if using hardware) or software like Synergy, Barrier, or Mouse Without Borders.

Method 1: Using Software Solutions

Software solutions are ideal for users who want to share their mouse and keyboard without additional hardware. This method is particularly useful in a home or office environment where devices are on the same network.
  • •Step 1: Download and install the software (e.g., Synergy) on all devices. Visit the official website: https://symless.com/synergy.
  • •Step 2: Open Synergy on the primary device (the one with the mouse and keyboard) and select 'Server' mode.
  • •Step 3: Configure the screen layout by dragging the device icons to represent their physical arrangement.
  • •Step 4: On the secondary device, open Synergy and select 'Client' mode. Enter the IP address of the primary device.
  • •Step 5: Click 'Start' on both devices. You should be able to move the mouse cursor across screens seamlessly.
  • •Step 6: To verify, move the mouse cursor towards the edge of the primary screen; it should transition to the secondary screen.
  • •Step 7: If it doesn't work, check firewall settings to ensure Synergy is allowed through.

For Windows 11

Windows 11 specific steps include:
  • •Ensure Windows Firewall allows Synergy: Go to Settings > Privacy & Security > Windows Security > Firewall & network protection > Allow an app through firewall.
  • •Check for any Windows updates that might affect network settings.

For Windows 10

Windows 10 specific steps include:
  • •Open Control Panel > System and Security > Windows Defender Firewall > Allow an app or feature through Windows Defender Firewall.
  • •Ensure both devices are on the same network and can ping each other.

Method 2: Using a KVM Switch

A KVM (Keyboard, Video, Mouse) switch is a hardware solution that allows you to control multiple computers using one keyboard and mouse. This method is suitable for users who prefer a physical device over software solutions.
  • •Step 1: Purchase a KVM switch that supports the number of devices you want to control.
  • •Step 2: Connect your keyboard and mouse to the KVM switch.
  • •Step 3: Connect the KVM switch to each device using the provided cables (USB or HDMI).
  • •Step 4: Power on the KVM switch and the connected devices.
  • •Step 5: Use the switch button (usually located on the front of the KVM) to toggle between devices.
  • •Step 6: Verify that the mouse and keyboard respond to the selected device.
  • •Step 7: If it doesn't work, check cable connections and ensure the KVM switch is powered on.

Troubleshooting Common Issues

Here are common issues and their solutions when sharing a mouse and keyboard across devices:
  • •Error: 'Connection Failed' - Solution: Ensure both devices are on the same network and check firewall settings.
  • •Issue: Mouse cursor doesn't move to the second screen - Fix: Check the screen layout configuration in the software settings.
  • •Problem: KVM switch not recognizing devices - Workaround: Reconnect all cables and power cycle the KVM switch.

Advanced Tips & Shortcuts

For power users, here are some tips and shortcuts to enhance your experience:
  • •Keyboard shortcut: Ctrl + Alt + Arrow keys - Switch between devices quickly (if supported by the software).
  • •Command line: 'ping [IP address]' - Check connectivity between devices.
  • •Hidden feature: Clipboard sharing - Some software allows you to copy and paste between devices.

Common Mistakes to Avoid

Avoid these common pitfalls:

Expert Tips

Using a KVM switch is often the most reliable method for sharing a mouse and keyboard, especially in professional environments.