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Newer Macs Can Use Another Mac as an External Display on macOS Monterey

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Mirror or extend the display​

When you send content from your iPhone or iPad to your Mac, you can choose to mirror your iPhone or iPad or extend its display by using a Mac as a secondary display for apps that support it, such as Keynote and Photos.“

secondary display support for iPadOS would be a huge deal. The real thing with a wired external monitor. Not airplay to a Mac…
 
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It would be interesting to compare this to air server. I use the latter to send my iPad screen to my mac as i use the iPad and Apple Pencil to annotate PDFs in live learning sessions that I deliver via Adobe Connect. It works pretty well.
 
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casperes1996 said:
Yeah, no I would've loved Target Display mode for my 2020 iMac to connect a PlayStation or something to it. This is alright for some things, but frankly I don't see myself using it
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Yeah ditto. I’d like to be able to use it as an external display for my Windows work laptop while I’m working from home.
 
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MauiPa said:
Even with the correct color profile? I have never had an issue. Well truthfully, once I did, the monitor somehow got a bad color profile, so I went into settings checked the profile, click all better, looks great, not "bad" and it was nowhere near A RETINA
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It's not about colour profile. With the right colour profile, colours are fine of course, so video playback is not a problem.

The problem is text quality. With non-Retina screens, the text quality is noticeably worse when the source Mac is on Big Sur than when it is on 10.13 High Sierra. With Retina screens it doesn't matter. Text in Big Sur and High Sierra both look good on Retina screens.
 
So, 7 years down the road I'll buy a new Mac and be able to use the Mac I haven't bought, yet, as a second display. Ofc, by that time the feature may no longer exist. I guess I won't get too excited just yet. :)
 
iObama said:
Ugh. Wish I could use my 2017 4K iMac as an external display for my M1 Pro. It’s a beautiful monitor that now just sits on my desk, while I use a 24” 1080p monitor with my M1. Boo.
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Look at the third party app, Airserver. Probably won't let you get 4K, but at least you can use some more space from the old Mac. http://www.airserver.com/
 
So that’s it! No need to buy a 3rd party monitor anymore. With the base iMac price, that 4.5k blows many displays out of the water for the price, especially if you get good discounts through work.

Larger iMac... Waiting for you!
 
This feature is like 20 years old, it was just renamed it but... big deal (sarcasm).
 
How is this different from Sidecar on iPadOS? Or is it effectively the same thing but on macOS?

BTW, I use Sidecar with my 10.5" iPad Pro and it works well enough via WiFi, but there are too many display glitches to accept this for daily use. It's significantly better wired, when it works that is.
 
MauiPa said:
Even with the correct color profile? I have never had an issue. Well truthfully, once I did, the monitor somehow got a bad color profile, so I went into settings checked the profile, click all better, looks great, not "bad" and it was nowhere near A RETINA
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Sub-pixel antialiasing has nothing to do with color. It has to do with straight edges, which we see in text. It makes text look better on displays that don’t have enough physical pixels to make it look crisp. Nothing can replace more pixel density, but antialiasing can help make it tolerable. And from what I’ve seen, it even makes retina screens look better. I miss it.
 
AppleTO said:
Will this actually work with the full 5K resolution of the display (scaled)? Or will it be limited to a 1080p stream or something?
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"Available on MacBook Pro (2018 and later), MacBook Air (2018 and later), iMac (2019 and later), iMac Pro (2017), Mac mini (2020 and later), Mac Pro (2019), iPhone 7 and later, iPad Pro (2nd generation and later), iPad Air (3rd generation and later), iPad (6th generation and later), and iPad mini (5th generation and later). Older iPhone, iPad, and Mac models may share content at a lower resolution to supported Mac models when “Allow AirPlay for” is set to “Everyone” or “Anyone on the same network” in Sharing preferences."


They aren't saying any more than this so far
 
I understand why a bunch of AI-dependent features of Monterey don’t work on Intel Macs but this just seems down to spite. The machines in question can all AirPlay to an AppleTV, for what possible reason could they not receive the display of another Mac or iOS device, other than pure spite?
 
I loved Target Display Mode, but this is better (even given the latency and compression) because I don't have to use a cable or restart the other Mac in TDM. Kinda seems like Airplay between Macs would've been a thing a while ago, but hey, we'll take it now.
 
Cosmosent said:
Is AirPlay over USB new ?

I've NOT heard of this before.

Anybody ...
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Probably not in so far as that USB connections can establish IP networks between macs and other macs or iOS devices. Airplay would generally choose the USB network due to its high bandwidth.
 
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