OBS lagging with ATEM 8.5.2 even no streaming.

Hello everyone!

I got a MacBook Pro 2019 16" and I found that the lagging is not about configuration or bandwidth.
I set up my ATEM mini pro to OBS and all the videos coming from blackmagic device has a lag, even no streaming, just the video getting in to OBS.
If I set up the mac webcam to OBS, it doesn't have lag OBS. Also I tried same set ap in a macbook pro with high sierra, and doesn't have the issue.
Anyone with the same problem?? any idea how to fix this?