Based on our record, Moonlight-Stream.org seems to be a lot more popular than Air Display. While we know about 284 links to Moonlight-Stream.org, we've tracked only 3 mentions of Air Display. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
You need Moonlight - https://moonlight-stream.org/ Nvidia discontinued/are discontinuing the GameStream service that you would have relied on before. Source: 6 months ago
Put Moonlight on the Shield and Sunshine on your PC. Alternatively, I think you can still use Steamlink to stream from PC to Shield TV. Source: 6 months ago
Moonlight Game Streaming (version 12.0.1): Play games from your PC on Android. Source: 8 months ago
Most of the problem is to do with the limitations of RDP, (edit, RDP = Remote Desktop Protocol) look into an alternative like https://moonlight-stream.org/ or parsec. Source: 8 months ago
An easy way to do this would be to setup something like this (it's free) https://moonlight-stream.org/ if you have an Nvidia GPU. Otherwise, Steam can share your screen in a similar way but in my experience it's not that good. Source: 8 months ago
Https://avatron.com/applications/air-display/ Not sure, if it does screen mirroring. Source: about 2 years ago
If you're talking about Target Display Mode, I'm afraid your iMac does not support it. You can still use something like Air Display, although I'm not sure if it will help you achieve what you want. Source: over 2 years ago
The other option is via software like AirDisplay, but that does cost money as well! Source: about 3 years ago
Parsec - Streams games locally or over the internet
Duet Display - With Duet Display, you can transform your iPhone or iPad into a second display to expand the screen space of your PC or Mac system.
Geforce Now - Underpowered PC can now pack the punch of high-performance GeForce GTX GPUs with GeForce NOW.
iDisplay - iDisplay is an app that turns a mobile device into a secondary desktop monitor. The app currently supports iOS, Android, Windows and MacOS, and it lets users connect a desktop computer to a mobile device over WiFi. Read more about iDisplay.
Shadow - Transform any device into a supercharged gaming machine.
spacedesk - spacedesk expands the Windows desktop computer screen to other computers over the local area...