Caitlin McGarryStaff Writer, Macworld

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Caitlin covers Apple news, social networks, and the sharing economy from IDG's New York bureau.

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Al Gore challenges SXSW to focus online activism on climate change

Gore urged the tech-minded folks who attend South by Southwest Interactive to wage an Internet campaign for climate change, just like they did for net neutrality and SOPA.

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Outages plague App Store, iTunes, and other Apple services

If you're trying to buy music, apps, or games this morning, good luck.

on macworld.com

Google's new Photos and Streams chief signals changes ahead for Google+

Google+ might split in two as photos move to the forefront.

Why Twitter just bought a social media talent agency

Vine stars are making millions off branded clips, and Twitter wants a cut.

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Apple helps Pinterest launch rich pins for better app discovery

The Cupertino giant will curate a Pinterest collection of featured apps.

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Twitter's plan to boost growth: Videos, messaging, and timelines for people who don't use Twitter

Twitter is creating an experience for you, even if you don't have a Twitter account.

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Twitter makes up with Google to make tweets easily searchable

The deal means more millions more eyeballs will be on Twitter, even without new users.

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Super Bowl dominates social media with dancing sharks and crazy plays

Twitter and Facebook saw a slew of posts, photos, and videos during one of the most exciting Super Bowl games in recent memory.

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Facebook edges into Foursquare territory with place tips on iOS

The social network will use a combination of Wi-Fi, GPS, and new Bluetooth beacons to show you location-based info.

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Facebook and Twitter battle to be your Super Bowl second screen

The social networks need your attention to serve up more ads.

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How Facebook is using autoplaying videos and ad tech to make billions

Now a $10 billion+ business, Facebook looks to the next decade.

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Twitter launches two much-needed new tools for video shoots and group chats

Forget timeline curation. Twitter's new features make the platform more appealing for both power users and newcomers.

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Apple brings back free music with new iTunes promotion

So long, Single of the Week. Hello, Free on iTunes.

on macworld.com

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Twitter timeline tweak helps you catch up on missed tweets

The new feature floats important stories to the top of your timeline in a Facebook-esque move.

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Facebook cracks down on News Feed hoaxes

Maybe now your friends and family will stop spreading that classic fake story about Facebook charging membership fees.