HOWTO: Change system language in Mac OS X

1) Apple Logo –> System Preferences

2) Icon ‘International’

3) Edit list of languages

4) Place ‘English’ above ‘French’

5) Logout, login

OR

5) Close international setings window

6) Apple Logo –> Force Quit Finder

7) Select ‘Finder’, Click ‘Relaunch’

http://davidtse916.wordpress.com/2007/11/19/changing-the-system-language-in-mac-os-x/

HOWTO: Clean up (speed-up) system

Remove everything in following subdirectories of Library:

Caches
Cookies
Saved Application State