Apple offers tonight the sixth beta (Developer Preview to be exact) of OS X Yosemite. It comes two weeks after the previous one. It includes fixes and improvements. We'll have to let developers install to realize any additional changes. The update is to be recovered directly from the Mac App Store.
Point to note, only developers are offered the update. Other users, which rotate with the public beta, have (for now) not updating to recover. Apple had already warned that the pace would be less important to public.
No new beta of iOS 8As can be seen, no new beta of iOS 8, next mobile operating system for iPhone, iPad and iPod touch seems to be mature. He had already said that there would be no sixth beta, it seems to be confirmed today.
Apple's next iOS 8 version will definitely be iOS Golden Master, i.e. The final version made available to developers.
See also: Apple's Touch ID may be extended to iPad and Macs.