s rendering engine was finished months ago. According to one source, the MacBU has been working on the browser for some time, and was able to develop a quality, Mac OS X-only browser. In beta versions, performance was acceptable and IE 6 took advantage of OS X technology like customizable toolbars, sheets, anti-aliasing, and even some Quartz effects like those in Office v.X. "We were told by upper management to hold it back until they gave it the green light," says one former MacBU developer, who spoke with Think Secret on condition of anonymity. A Microsoft representative said that MSN for Mac OS X will be available in 2003 for consumers in the United States, and confirmed that Microsoft is continuing to enhance Internet Explorer but wouldn't provide a specific release date for version 6.