HDMI splitter/switch issue — works with MacBook but not with Windows PC

Title: Troubleshooting HDMI Splitter and Switch Compatibility Issues Between MacBook and Windows PC

Are you experiencing connectivity issues when using an HDMI splitter or switch to toggle between a MacBook and a Windows PC on a single monitor? Many users favor affordable bi-directional HDMI switchers to streamline their workspace, but compatibility problems can sometimes arise, particularly when switching between different operating systems and hardware configurations.

Understanding the Issue

In this scenario, the user has a basic HDMI device labeled as a “bi-directional” splitter or switch, intended to allow sharing a monitor between a MacBook and a Windows 11 PC. While the MacBook displays content correctly through the device, the Windows PC fails to display anything when connected via the same switch, even though it works normally when connected directly to the monitor.

This kind of inconsistency is not uncommon with inexpensive HDMI switching devices that are often marketed as “bi-directional” or “manual” switches. These devices can sometimes have compatibility issues due to their internal circuitry or the way they handle EDID (Extended Display Identification Data), HDCP (High-bandwidth Digital Content Protection), or signal switching protocols.

Troubleshooting Steps and Considerations

Test with Different Cables and Ports
You’ve already tried swapping HDMI cables and trying different ports, which is a good first step. Ensure that all cables are high-quality and capable of supporting the necessary resolution and bandwidth.
Verify Direct Connection Functionality
Confirm that the Windows PC displays correctly when connected directly to the monitor. This helps isolate the problem to the switch rather than the PC’s output.
Check Power Supply for the Switch
Some HDMI switches require an external power source to function properly, especially when transmitting high-resolution signals or HDCP. If your device is powered, ensure it is connected correctly.
Adjust Display Settings on Windows
Sometimes, Windows may need to be manually configured to recognize an external device. Check display settings to see if the monitor is detected but perhaps set to an unsupported input mode.
Compatibility and Quality of the Switch
Inexpensive HDMI switchers are often marketed as “bi-directional” or universal, but many have limitations or proprietary features that don’t work well with all devices. Consider upgrading to a reputable, high-quality HDMI switch designed specifically for compatibility with both Macs and Windows PCs.