hat versions of Lotus Notes are supported on Apple's OS X 10.8 Mountain Lion?
The week of October 1st, 2012, IBM will release a Notes 8.5.3 slipstream as well as Interim Fix 1 for Notes 8.5.3 Fix Pack 2, both of which introduce support for OS X 10.8. The same support will be included in Notes 8.5.3 Fix Pack 3 (currently planned for release in November 2012) and in all future Notes releases.

The updated installer will replace "Notes" in the Applications folder with "Lotus Notes".