The zip-file contains all three operating system installer. Windows, Linux and Mac, but i had no success to install through xpd.mac-addon.pgk, because the preinstall script stop the installation.
You can open this file in finder:
Now you can copy the updatesite folder to an other place and use File – Application – Install in Lotus Notes. Point the Install to the updatesite folder and install the whole package. I have to restart twice, but after this i can use the new Status Update, Files and Activities Plugins.