As previously reported, Mac OS X 10.4 Tiger will go on sale tomorrow at Apple retail stores and participating Apple Authorized Resellers. All 105 Apple Stores worldwide will host “Tiger World Premiere” events from 6:00 p.m. to midnight offering workshops and hands-on demonstrations of Tiger’s hottest features, plus giveaways including a chance to win a PowerBook, iPod and more. “Starting tomorrow night, features like Spotlight and Dashboard will change the way millions of people use their computers,” said Philip Schiller, Apple’s senior vice president of Worldwide Product Marketing. “Our competitors will be trying to copy Tiger’s more than 200 new features and innovations for years to come.” Be sure to send us photos if you attend an event.