Port forwarding for Linksys Maxstream EA9500

Trying to set up remote access from my channels DVR. It is running on my mac os which stays on all the time and has a 4tb external drive attached to it. Everything I find on the internet says my router isn’t compatible and when I enable it manually, it still doesn’t work. Any suggestions for this router?

Once you enable manually, you can leave the box unchecked.