I tried to start my macbook today, which has mac os 10.4 and windows XP installed on it, and it refuses to go into MAC OS. When I hold the options key down to select the partition, it doesn't matter which partition I select, it boots into XP. I have the settings selected in the control panel start up menu to boot to mac os as well, but it doesn't work. I've had bootcamp installed for almost a year with no issues. Anyone know how I get back onto MAC OS?