Why can't I connect my iPhone wirelessly to Mac Mini M4?

This worked for me (iPhone 15 pro max, M4 2024):

In order to use your iPhone as a microphone on a Mac without a built-in microphone, the iPhone must be in landscape orientation and stationary, with its screen turned off.

Use your iPhone as a webcam on Mac – Apple Support (UK)

I was having the same problem. iPhone would not connect wirelessly to M4 Mini. Just by chance I found a fix, hope it works for you. I packed up my MacBook to go and moved it to my bed. I came back to desk and iPhone was working as a webcam for FaceTime wirelessly. It has continued to work just fine as long as my MacBook is not closer to the phone than the Mini. Maybe the antennas in the MacBook are stronger and cause interference, who knows...

Same issue here. Iphone SE 3rd Gen. Everything works with cable but wireless the Iphone only shows up in Finder. Tried Photobooth, Go2Meeting and Facetime and the camera won't show up. Tried to find a solution with GPT for 3 hours and yes the power is on and the iphone lies down unlocked right next to the mac mini m4. Mac runs on 15.1.1 (24B2091) and Iphone on 18.1.1.

for me it solved itselve the next day or two. I didnt change anything. I just connected my Iphone with the Mac Mini via cable which just worked. Photobooth is the easiest way to test it. And then I restarted my Mac but it still didnt worked wireless. The day or two after I had an online meeting again and all of the sudden my Iphone was connected with the mac.

Maybe try to restart both? I can't say what the problem was but it seems necessary that they know eachother with a cable connection first.

Yes, have a look at > Use Continuity to work across Apple devices - Apple Support

Both have to have Bluetooth and wifi on. review these steps:

Use your iPhone as a webcam on Mac - Apple Support

My iPhone13 has no issue using wirelessly with my Mini M4 pro. Did you follow all these steps to connect:

Use your iPhone as a webcam on Mac - Apple Support

Same exact issue here. Iphone 16 with iOS 18.1. Works fine on my MacBook air m2.

I have the Mini M4 pro. using one display. No issues using my iPhone (13) with IOS 18. Did you open PhotoBooth and in menu select camera? Does your iPhone show as an option?