What are page up/ page down keys on Macbook for TextMate? In other apps I use Command-UpArrow / Command-DownArrow, but those go to beginning/end of file in TextMate.
fn+&#9650; and fn+&#9660; are Universal page up/down on OSX with abridged keyboards.

fn+&#9664; and fn+&#9654; are home and end respectively.