The new OSX version, El Captain is a faster new OS.
But, after the update, my trusted MenuMeters application stopped working. 🙁
I have found a solution!
Here you can download a new unofficial version of MenuMeters with a patch making the software working again. Great work Yuji!
PS: if after installing the new unofficial version of MenuMeters, you get the error “Could not load MenuMeters preference pane.”, quit “System Preferences” (or restart your Mac) and try again.