Other applications allow multiple social-media users to chip in and collectively buy items, and some let shoppers make payments to merchants without leaving the social-media sites.
The collaboration involves multiple brands, retail and fashion with gift items from 24 well-known designers, all members of the Council of Fashion Designers of America (CFDA).
Each uses an Internet service -- iCloud in the case of Mountain Lion, SkyDrive with Windows 8 -- to share data, settings and other items between multiple computers and other devices.