Since the public unveiling of Mac OS X 10.3, codenamed Panther, during June's World Wide Developer Conference, Apple has provided developers with a pair of updates for the forthcoming OS that remains under active development.
The latest distribution, dubbed Panther 7B21, was frozen last week and was briefly distributed to developers over Panther's Software Update module. Soon after, the release was made available via a 3 CD image set on Apple's Developer Connection servers. Coupled with the 7A202 build released a few weeks earlier, the two seedings provide a number of speed and user experience enhancements over what was already made public in June.