Manage Website Data list doesn't load

1. Empty Caches

Safari > Preference > Advanced

Checkmark the box beside "Show Develop menu in menu bar".

Develop menu will appear in the Safari menu bar.

Click Develop and select "Empty Caches" from the dropdown.

Do this couple of times

2. Delete Cookies

Safari > Preferences > Privacy > Cookies and Website Data...:

Click the “Manage Website Data..” button.

Remove all cookies except ones from Apple, your internet service provider and banks.

I have this same problem. The Delete Cookies answer doesn't help, because it's the description of the problem:

> "Click the "Manage Website Data.." button.

The problem is that the website data doesn't load.

Or not consistently, anyway. I left it trying to load for 15 minutes and it never showed any cookies. I repeated this for varying lengths of time. Finally, the window populated with cookies.

The question is, why doesn't it always work?

I had the same problem of website data not loading in the Privacy Preferences for "Manage Website Data", which came on suddenly. For about a day, no matter what I tried, I couldn't get the website data to load. I suspected I had a DNS Cache poisoning episode, as I was getting Google ads from spammers, yet because of this problem I couldn't delete those spammers' cookies (or anybody's).

I found that flushing the DNS Cache made the data load correctly and reasonably speedily (there always seems to be a slight delay). See here for technique: http://osxdaily.com/2015/11/16/howto-flush-dns-cache-os-x-elcap/. Deleted the spammers' cookies and all returned to normal.

Anybody know if this makes sense?

You might want to consider starting a new discussion. Since this one is marked solved, less people are likely to look at it. A new post would be much more visible. You can link to this one.

It does make sense.