Show Twitter feed in Safari's Sidebar Being able to see your twitter feed in a Safari Sidebar is pretty cool, and definitely under documented.
- Add your Twitter credentials to the "Internet Accounts" panel of "System Preferences."
- Click on the "open book" icon in the new Safari bookmark bar.
- Select "Shared Links" or use the keyboard shortcut ^⌘3 to toggle "Shared Links".
I believe that this is all that I did to be able to see my twitter feed in the safari sidebar.