1- install the followig packages:
2- In terminal run "compiz --replace" or run Compiz Fusion Icon and choose compiz as your window manager.
3- Go to Startup Applications click on add and in the name field write "compiz" and in the command field enter "compiz --replace"(without the punctuation) click on Add again then Close. This is to make compiz start automatically on next logins.
4- To stop that high CPU usage run in terminal “mateconf-editor”. When the editor opens go to /desktop/mate/session/required_components/windowmanager and replace "marco" with "compiz".
3- install "dconf-editor" by runnig in terminal:
sudo apt-get install dconf-tools
Then press ALT + F2 and run: "dconf-editor", navigate to org > gnome > desktop > vm > preferences and change the "theme" value from "Adwaita" to any other installed theme you want. Remember this because in the same place you can also change the window button layout, among others.Note:
compiz has been forked for Mate a few months back. You can find it athttp://forums.linuxmint.com/viewtopic.php?f=217&t=114613
with a complete tutorial as on how to install it !! Check it out It rocks!!