I've always been happy with Avast/Mac/Sierra. I am not sure when my last Avast updates were done, but all is up to date. I had to turn the mail and web shields off--at least when using Ancestry.com--using both Chrome and Safari. It appears they are keeping me from seeing any media on Ancestry (e.g, photos, censuses, etc.). I never had the problem until Tuesday, 7/11/17. Any thoughts anyone.