Yep. Just got the same error and blocked virus alert.
$ pinata diagnose -u
OS X: version 10.11.5 (build: 15F34)
Docker.app: version v1.11.1-beta13.1
Running diagnostic tests:
[OK] Moby booted
[OK] driver.amd64-linux
[OK] vmnetd
[OK] osxfs
[OK] db
[OK] slirp
[OK] menubar
[OK] environment
[OK] Docker
[OK] VT-x
Docker logs are being collected into /tmp/20160606-084404.tar.gz
Most specific failure is: No error was detected
Your unique id is: 4F1A1552-7203-464D-9FE5-8F7A19977AC7
Please quote this in all correspondence.