Discussions with broadcasters such as CBS Corp and Twenty-First Century Fox Inc to license programming are progressing slowly, and lack of content has led Apple to scrap plans to announce the service at a Sept. 9 event, Bloomberg said. Apple also lacked the computer network capacity to ensure a good viewing experience, Bloomberg said. The company still plans to introduce a more powerful version of its Apple TV set-top box at the event, which will be held in San Francisco.