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Ciao, io ho usato questa guida e funziona!! ;)

 

This guide shows you how you could use the Darwin bootloader of OS X as the boot manager.

 

Assumption: partition 1 = OS X, partition 2 = Vista

 

Step 1: install OS X on partition 1.

 

Step 2: make partition 2 the active partition so that Vista can be installed on it.

Boot up OS X and in a terminal window,

sudo fdisk -e /dev/rdisk0

flag 2

quit

reboot

 

Step 3: install Vista on partition 2.

 

Step 4: restore OS X on the MBR.

Boot off OS X dvd disc in single user mode (press F8 & type -s). At single user prompt,

fdisk -e /dev/rdisk0

flag 1

update

write

quit

reboot

 

Step 5: make partition 2 the active partition now to boot up Vista.

At this point OS X should boot up and in a terminal window,

sudo fdisk -e /dev/rdisk0

flag 2

quit

reboot

 

Step 6: restore Vista on the MBR.

Upon reboot, Vista will show "\Window\system32\winload" corrupted.

Insert Vista disc & follow directions to recover.

Reboot & check that Vista boots up fine.

 

Step 7: make partition 1 the active partition again to use the Darwin bootloader.

Boot off OS X dvd disc in single user mode again (press F8 & type -s). At single user prompt,

fdisk -e /dev/rdisk0

flag 1

quit

reboot

 

Voila!

 

To set the timeout duration of the Darwin bootloader, add the following flag to /Library/Preferences/SystemConfiguration/com.apple.Boot.plist

<key>Timeout</key>

<string>x</string>

where x = number of seconds the bootloader will wait before booting up partition 1.

 

 

Buona fortuna!!

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