How do I connect my Nintendo Switch to the IMac?

I'm looking for a suitable product on Amazon that gives me the opportunity to connect the switch to the IMac. If possible, the product should not be a capture card, as these are very expensive. Can someone help me. I had expected a possibility of up to 20 euro.

Do you want to use the iMac as a screen or record your games?

Use as a screen only.

Then you have to see whether the Mac has an HDMI input or an HDMI output. If it has an output, it doesn't work because both devices then transmit data over the cable and neither of them accepts the signal. Then you just need a different monitor.

Sorry, I just saw for the first time that I wrote that as an answer to the question and not as an answer to your comment ^^

Ah OK thanks. Ne the iMac has no HDMI only USB-C.

Then there's probably nothing more…

buy a USB-C to HDMI cable and just try it out… You can just send it back

Which iMac is it?

I had already checked, but with some I'm not sure, because some of them said, for example, that they are not suitable for Switch.

The one here: https://www.saturn.de/...38201.html

Capture Card is your only option. Because the newer iMacs no longer have the option of being used as "only" a screen.

Ah ok a shame then I'll have to continue playing from the TV

1st world problems.