I have a new mac pro whic has arrived today, just created a partition for winxp and installed it successfully. I cannot seem to get the machine to boot back into the Mac OS though, Have tried repeatedly to start up and get it running holding down the option key as you are supposed to but it just ignores it and goes into XP. Have tried changing the startup disk in the control panel in XP as suggested by the windows xp bootcamp help but it ignores that as well. Anyone got any ideas? P.S I am using a bluetooth wireless apple keyboard I hope that is not the problem.