Macbook extended display to another macbook aspect ratio and resolution problem

[Qvinto1]

Hi,

I am trying to use both a macbook 14 and 16 at the same time. The 16 is being used as an extended display for the 14. With the standard apple extended display feature the aspect ratio o fthe extended image on the 16 is limited to 16:9 due to what seems like AirPlay limitations. I have used BetterDisplay (BD) to create a virtual screen with a 16:10 aspect ratio which i then mirror onto the MBP 16 extended display. This gives me an image on the MBP 16 with a 16:10 aspect ratio. However, the resolution scaling setting is such that the text is very small on the MBP 16 screen. I have tried adjusting the resolution slider in BD for the virtual display but it has no effect. Is there a way to fix this and use BD to create a extended display on my MB16 with a 16:10 aspect ratio AND a adjustable scaling? also ideally setting the brightness of the 16MBP beyond the 600nits built in limit. Thank you!

[waydabber]

You should not use AirPlay, but the built-in Screen Sharing - connect to the 14" from the 16" and use the virtual screen as source.

[Qvinto1]

OK thank you, i will try that. Cheers

[Qvinto1]

You should not use AirPlay, but the built-in Screen Sharing - connect to the 14" from the 16" and use the virtual screen as source.

Hi This does not seem to work. If i screen share from one macbook or the other, the other macbooks screen always truns black and is not visible. Any advice on how to get this going? thanks.

[Qvinto1]

Ok, you have to turn off "high performance" mode in screen sharing, and then the screen remains visible. I created a virtual screen on the 14" and screenshared it to the 16" and used the 14" as the main laptop. It needs a fast internet connection otherwise the image is very laggy. Thanks.

[Qvinto1]

Actually even with a fast LAN this solution is still really choppy and at times unusable. Dissapointing

[waydabber]

Make sure the connection actually uses the LAN and the connection uses compression - this should be rather fast. Using High Performance mode removes all native displays and uses virtual displays so it's not good if you want to keep the remote Mac's display visible.