Many, if not most, professional Mac users prefer a multiple monitor setup. Sometimes these setups extend to 3 or 4 monitors. In this scenario it can be handy to have two separate displays, each with a mirror in another room. Or perhaps an audio professional may use 3 separate displays in a recording studio, with a mirror of your main monitor for external viewing/operation in the recording booth.
This all sounds great, but achieving this kind of setup can be a little tricky in OS X, Apple don't exactly make it clear that this option is even available.
Don't worry though, this option is available and below is a step by step guide on how to do it.
The exact composition of the protocols that AirPlay Mirroring uses have not yet fully been discovered, or reverse-engineered. However, an unofficial AirPlay protocol specification is available. 30 Supported hardware (when using OS X Mountain Lion or later) includes any 2011 or later iMac, Mac mini, MacBook Air, MacBook Pro, or the Mac Pro. Compile cdpr for Mac OS X Several existing tools can retrieve the CDP information from a Mac. The solution that seems the easiest to use is available on Source Forge under the project name cdpr. Before you begin this step, it is necessary to install Xcode from the Mac App Store and the 'Command Line Tools'. These are in the Xcode.
How to get to Display Options in Mac OS X
To get started, just head to ‘System Preferences' and click the ‘Displays' option. This will take you to the ‘Displays' preferences screen where we then can mirror specific displays. You should now be presented with a screen like the one below:
How to Set Up 4 Displays with 1 Mirrored Monitor
To achieve a monitor set up like the one above, may seem impossible at first, but it's actually really simple, Apple just don't tell you how to do it. All you need to do is hold the ‘Alt' key on your keyboard and then drag one of your secondary monitors onto your main monitor (your main monitor is identifiable by the menu bar on the top of the screen). By using the ‘Alt' key, we can now mirror specific monitors. In the set up above we have 3 separate independent displays and one monitor that mirrors the main monitor.
You can also mirror a secondary monitor, this set up would look like the one below. Simply drag your desired mirror onto a secondary display rather than your primary one.
How to Set Up 4 Displays with 2 Mirrored Monitors
To achieve a set up like the one above, 4 displays, 2 sets of mirrors, you just have to use the same ‘Alt' dragging technique. Please note, in testing it seems you must first mirror the main display and then the secondaries. This game isnt finished mac os. For some strange reason, it just reverts back to one mirror if you do it the other way around.
The exact composition of the protocols that AirPlay Mirroring uses have not yet fully been discovered, or reverse-engineered. However, an unofficial AirPlay protocol specification is available. 30 Supported hardware (when using OS X Mountain Lion or later) includes any 2011 or later iMac, Mac mini, MacBook Air, MacBook Pro, or the Mac Pro. Compile cdpr for Mac OS X Several existing tools can retrieve the CDP information from a Mac. The solution that seems the easiest to use is available on Source Forge under the project name cdpr. Before you begin this step, it is necessary to install Xcode from the Mac App Store and the 'Command Line Tools'. These are in the Xcode.
How to get to Display Options in Mac OS X
To get started, just head to ‘System Preferences' and click the ‘Displays' option. This will take you to the ‘Displays' preferences screen where we then can mirror specific displays. You should now be presented with a screen like the one below:
How to Set Up 4 Displays with 1 Mirrored Monitor
To achieve a monitor set up like the one above, may seem impossible at first, but it's actually really simple, Apple just don't tell you how to do it. All you need to do is hold the ‘Alt' key on your keyboard and then drag one of your secondary monitors onto your main monitor (your main monitor is identifiable by the menu bar on the top of the screen). By using the ‘Alt' key, we can now mirror specific monitors. In the set up above we have 3 separate independent displays and one monitor that mirrors the main monitor.
You can also mirror a secondary monitor, this set up would look like the one below. Simply drag your desired mirror onto a secondary display rather than your primary one.
How to Set Up 4 Displays with 2 Mirrored Monitors
To achieve a set up like the one above, 4 displays, 2 sets of mirrors, you just have to use the same ‘Alt' dragging technique. Please note, in testing it seems you must first mirror the main display and then the secondaries. This game isnt finished mac os. For some strange reason, it just reverts back to one mirror if you do it the other way around.
There you have it, specific monitor mirroring in OS X explained. If you have any questions just let us know in the comments section below.
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