Joe Rossignol, writing for Mac Rumors:

Apple has fixed an issue that prevented shortened “t.co” links on Twitter from loading in Safari on the third beta version of OS X 10.11.4, seeded to developers for testing on Monday, according to developer Dieter Komendera.

Here’s the referenced tweet:

Apple just sent back my radar about http://t.co urls not working in Safari, saying it’s fixed in latest 10.11.4 beta. #finally

Glad to see this fixed. It’s been an annoyance for far too long.