[texhax] Color typing in TeXShop

[Aldo da Rosa]

Dear Sirs:
I  use OS X version 10.6.7,  TeXShop Version 2.14-svn (2.14), and I belong to the "long time user, totally ignorant" class of TeX user. This has not kept me from typesetting my own published books (eg. "Fundamental of Renewable Energy Processes, Elsevier).

In a coming book, I need some text in color. However, every time I type in the preamble \usepackage{color}, I get the error message "Undefined control sequence".

SOS

Aldo