Unfortunately not. As far as iOS is concerned, HDMI works at the device level, and responds according to the EDID of the display device - if the display announces via its EDID it handles audio as well, then the iPad will switch audio over to the display device, in accordance with HDCP and the HDMI spec.
I went to the Apple store to get some diagnostics done. When I plugged into one of the high end 4K LG monitors that had USB C built in it ran fine, even using Affinity Photo on high resolution projects. My guess is the USB-C adapters I tried were only Thunderbolt 2 and not Thunderbolt 3 capable. The hard part is getting honest/clear specs on the adapters, ...
HDMI on Macs is a curse, because Apple decided to take the HDMI spec more than just literally – not only do they rigorously enforce HDCP, but they take the unusual move of letting the display set the rules, not the host machine. Nor do Apple stick completely to the DisplayPort spec; getting 4K out of a 2013/2014 machine requires one part luck and one part ...
I am assuming that the screen resolution of MacOS is higher than your projector or vice-versa.
Have you checked the option Scaled from Resolution option on Display and give a try with a different option from 1920 to 1280? Check it should work in lower resolution 1280X720 at least.
You also check the maximum resolution support by your Projector.
This question already has an accepted answer on stackoveflow: https://stackoverflow.com/questions/11067470/how-to-use-windows-laptop-as-external-monitor-for-macbook-pro
It requires downloading the following software:
MaxiVista on PC
ScreenRecycler (for Mac)
It seems like Maxivista.com has migrated to https://www.sharemouse.com/ (Since MaxiVista has been ...
This answer recommends using Soundflower to fix this issue. Maybe it has improved since you tried it? I used Homebrew to install it on my Mojave system, and it works flawlessly:
$ brew cask install soundflower
$ brew cask install soundflowerbed
Remember to give Soundflower whatever permission it asks for in system preferences. Set system audio output to ...
Dude, i can tell you from personal experience; after buying four different usb-c hdmi adapters that the ONLY adapter that enabled me to utilize my external monitor full resolution + high refresh rate without having to hack internal /System/Library code or messing with SwitchResX/other b.s. GUI garbage;
is the belkin usb-c to hdmi adapter (the white version, ...
I was using the Hyperdrive Pro Docking Station, and apparently its sharing the signal for its HDMI and DP port. I had to buy an adaptar (USB-C to HDMI) to attach the second monitor to the hub, and this solved the issue.