Mac OS 8.7

Mac OS 8.7 (alpha version a6c2, code named "Sarah") was a pre-release version of the successor to Mac OS 8.6 that was renamed to Mac OS 9 (code named "Sonata").

Features
Mac OS 8.7 is based on the faster PowerPC-native nanokernel introduced in 8.6 and featured several new control panels, such as Keychain Access (revived from PowerTalk), Multiple Users, and Software Update.

History
Early development builds of Mac OS 8.7 began to surface in February 1999. By June, the 5th seeded build, Beta 2, was code named "Spunky" and featured a revised version of Sherlock with a brushed metal interface similar to QuickTime 4.