Samsung recently released an official Beta build of Marshmallow for the Galaxy S6 and S6 Edge. The Xposed team has already put together the Xposed Framework for Marshmallow on the S6! The team has taken a bit of extra time getting Xposed on other marshmallow devices so the turn around here was pretty quick. The new build of Marshmallow includes lots of new security patches. This means installing xposed is going to be a bit difficult. You will have to flash a few things before you get Xposed to work. If you are one of the few running the Marshmallow Beta Build head to the link below.
via XDA