Here are more detailed steps to extend your monitors on Mac OS and Windows:
Mac OS:
Connect the second monitor to your Mac using a suitable cable such as HDMI, DisplayPort, or Mini DisplayPort.
Power on the second monitor.
Open System Preferences by clicking on the Apple menu in the top-left corner of the screen.
Select "Displays".
In the Displays window, select the "Arrangement" tab.
Click and drag the white bar in the menu bar to the second monitor. The bar represents the primary display.
Check the box labeled "Mirror Displays" to turn off mirroring.
Your second monitor should now be extended to your desktop, allowing you to use both monitors as separate and distinct displays. You can now drag and drop windows and apps between the two monitors for increased productivity.
Windows:
Connect the second monitor to your Windows PC using a suitable cable such as HDMI, DisplayPort, or VGA.
Power on the second monitor.
Right-click on your desktop and select "Display settings".
In the Display settings window, scroll down and click on "Multiple displays".
Select "Extend these displays".
Your second monitor should now be extended to your desktop, allowing you to use both monitors as separate and distinct displays. You can now drag and drop windows and apps between the two monitors for increased productivity.
If the display of the second monitor is not correct, you can adjust the resolution and orientation by clicking on the "Identify" button in the Display settings window.
Note: Some older versions of Windows may not have the "Multiple displays" option in Display settings. In such cases, you can try using the Windows Key + P shortcut to switch between display modes. Additionally, if your Windows PC does not automatically detect the second monitor, you may need to install updated drivers or check that the cable is securely connected.