Connect PS4 to iMac?

I've been looking for an adapter that allows me to connect my PS4 to my iMac via HDMI and play games.

I know that there's a wireless way to connect the PS4 to the iMac via Wi-Fi, but this does not work as intended.

If someone has a solution I would be very happy about an answer!

Here's how to use an iMac as a screen:

https://support.apple.com/...e/HT204592

Here is a video especially about consoles (eg PS4):

Thanks a lot!

However, this variant is much too expensive, as it would be more worthwhile to buy a screen with HDMI input.