Version 2.4.0 is available upstream. Please consider updating!
It seems that version 2.4.0 is available upstream, while the latest version in the Gentoo tree is 2.2.1. You think this warning is false? Read more about it here.
mbpfan is a daemon that uses input from coretemp module and sets
the fan speed using the applesmc module. This is an enhanced
version of Allan McRae mbpfan. This enhanced version assumes any
number of processors and fans.