Apple's Beats brand in April unveiled the Powerbeats Pro, a redesigned wire-free version of its popular fitness-oriented Powerbeats earbuds.
Discontinued Apple Software Returns to 'Purchased' Tab in Mac App Store
The disappearance of the ability to re-download older software irked users, with some calling the action "user hostile." It's unclear if Apple pulled the software intentionally or whether the Mac App Store experienced a temporary bug in advance of the availability of OS X El Capitan. However, the software was unavailable for several days before returning tonight.
Only one of the apps, Aperture, will continue to be compatible with OS X El Capitan.
Update: As noted by several readers, some discontinued software including Logic Pro 9 and older versions of OS X Server remain unavailable for re-download from the Purchased tab.