Airplay to Mac - As of macOS Monterey, Apple introduced Airplay to Mac support for using another Mac as a screen. However it suffers from two major limitations: it maxes out as 4K and it doesn't support PC.. Duet Display - Works with Mac or PC to use the iMac as a display, but it doesn't have support for 5K or USB connectivity and it.. To use iMac as the monitor for PC, you should use the iMac version of a late 2014 version that comes with the Mini Display and Thunderbolt port functions. Other iMac versions can be also the 2009 or mid-2010 with 27 inches in size (of course, with Mini Port Display port), the 2011 and 2014 versions with Thunderbolt port.
Using Duet to connect your iMac as a second monitor is a great way to increase your productivity and make the most of your desktop workspace. Whether you're a professional working on multiple projects at once, or a student who needs extra screen real estate for research and writing, using your iMac as a second monitor can be a game-changer.. How to use iMac as a second display. Using iMac as a second display benefits you in many ways. such as recording video on Mac. You can extend your desktop space and have more room for video playback, editing tools by using iMac as a second display. Here's the step on how to use iMac as a second display. Step 1. Open iMac and runs Windows.