The guys at the Apple stores says it can’t be done … while I went to all the hardware stores to look for a mini-DisplayPort splitter … it doesn’t exist. If you’re looking for where to tweak scaling and other options for the mirrored or extended desktop, that’s where to find them.I’ve been looking to share my screen from my Macbook Air on two monitors (duplicate/clone) … and there was not many options available. Monterey also adds a Display Settings button that reveals a list containing each directly connected or AirPlay streaming display to manage those settings. While possible previously, it was more complicated to figure out how to set up. This makes it easier if you have two displays or more on a Mac and want to mirror one of your external displays. Mirror for display name: Like in earlier releases, this enables mirroring from the display you select from to the display listed.Extend Display: Available when mirroring is disabled, you can change the primary screen (the one treated like the main display in terms of menus and other system elements) by selecting it.

Main Display: Make this the primary display, always chosen the first time you enabling AirPlay streaming to a target to the internal or primary display of the Mac.These options are a little different from previous versions of macOS, too. In either case, you can click a display name and choose an option to change extending or mirroring. They either appear side-by-side for an extended desktop or overlapping for a mirrored one, as shown in the figures below. Now in the Displays preference pane (if you’re not already there), there’s a new visualization, which shows an proportionately sized outline of the displays part of or connected to your device and that of the AirPlay destination.

Alternatively, select the destination from the Add Display menu in the Displays preference pane.) In the Control Center, click Screen Mirroring and select your AirPlay destination.

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