The 5.5.1 version of TED for iPad for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free Mac application is an intellectual property of TED Conferences, LLC. We recommend checking the downloaded files with any free antivirus. The application lies within Education Tools, more precisely Teaching Tools.
From the developer:
TED for iPad is an application that lets you discover inspiring, funny, or jaw-dropping talks and curated playlists. You can sign in to your TED profile to sync saved talks across devices. In addition, you can browse the TED Talks video library, with subtitles in over 100 languages. Furthermore, you can play videos on your device or send to your home entertainment system via AirPlay or Chromecast.
You may want to check out more Mac applications, such as ted, GIF'ted or Ted Bob in a Mario Costume, which might be related to TED for iPad.