It is my pleasure to announce that "Mars
RC2" is available from the Eclipse Platform Project.
But, see "UPDATE CAUTIONS"
below, if you have an "old" version of a Mars installation (such
as M6 or earlier).
Much thanks to everyone who made this
release candidate possible.
If you have a an installation of Mars
from prior to 4/27 (such as M6), then you can not update directly to RC2.
You'll get a message about "blockMacUpdates
action not found" and be left with a fragile, if not broken installation.
(See Bug 468061).
This does not apply to M7 or RC1 installations
(nor Luna installations) ... those can all update directly to RC2.
But for earlier Mars installations,
we recommend you either download a fresh copy of an archived install, or,
update to M7  or RC1  first, before
trying to update to RC2.