Cloudflare WARP on MacOS: "One or more processes are already bound to port 53: mDNSResponder"
I'm on an M2 Macbook Air with MacOS 14.2.1 Sonoma, and I just installed the Cloudflare WARP client. It installed fine, but now when I try to connect, it gives me the error "The WARP Agent must be the only process responsible for DNS resolution on the device. One or more processes are already bound to port 53: mDNSResponder". I've looked this up online, but all the solutions involve something with Docker Desktop, and I don't have Docker or Docker Desktop installed, so that's not my issue. Does anyone else know any processes or apps that might be responsible for this?
1 Reply
Some others said it could be Internet Sharing, a few other possiblities here: https://community.cloudflare.com/t/zerotrust-unable-to-connect-port-53-bound/486081/14?u=chaika
plus can use
sudo lsof -iTCP:53 -iUDP:53 -n -P to list all bound on 53