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That would be awesome and it’s a much requested feature to be able to use iPad natively as a second screen on macs but the only option would be Astropad and duet display which are not that great. Currently Usb c only allows video output on iPad but not input.
 
There is Luna Display, which plugs into USB C or MiniDisplayport to pretend to be a monitor. Then it routes that image either through USB(lightning) or Wifi to your iPad.

WOW this is perfect, watching reviews online looks like there's basically zero lag as it's not a software trick, it's hardware based. So it can take advantage of Graphics Acceleration & Metal 2!
 
I have luna as well and it's pretty good as a second monitor but if that's your daily setup especially with an expensive computer like Mac mini I feel sorry for you. There's a noticeable delay, as in the mouse cursor feels floaty, videos will skip frames and sound will come a bit faster than video and image quality is comparable to airplay, it's compressed.
 
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I have luna as well and it's pretty good as a second monitor but if that's your daily setup especially with an expensive computer like Mac mini I feel sorry for you. There's a noticeable delay, as in the mouse cursor feels floaty, videos will skip frames and sound will come a bit faster than video and image quality is comparable to airplay, it's compressed.

Oh yeah, well maybe it will work with the new iPads directly as it's USB-C now, as iPad to Monitor works. I don't think it would be much for Luna or another company to make an app that makes the iPad act as a monitor via USB-C, then there will be 0 lag.
 
Oh yeah, well maybe it will work with the new iPads directly as it's USB-C now, as iPad to Monitor works. I don't think it would be much for Luna or another company to make an app that makes the iPad act as a monitor via USB-C, then there will be 0 lag.
I don't think you quite understand it. Just how you can't plug in a Mac Pro into a MacBook to output video, Usb c is the same. It only transfers video one way. Our only hope is that usb c improves data transfer speeds then that would allow faster and better incoded video transmission. But quality wise that still wouldn't get it anywhere close to even a $100 display which is what I'd recommend you getting.
 
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