boot snow leopard in 64 bit
by admin on Sep.09, 2009, under apple, mac os x, snow leopard
As mac os 10.6 (snow leopard) release last 28th august, all the mac lovers are busy to upgrade. i am already using it . 
Soon i will share my experience.
One of the main feature of this release is the 64bit kernel.Using the following command you can check if your hardware support 64 bit kernel.
$ ioreg -l -p IODeviceTree | grep firmware-abi
Though your hardware is capable to run 64 bit kernel it don’t boot in 64 bit. In this post i will show you how to boot in 64:
1. press 6 and 4 at the boot time. (keep press the 6 and 4 key till you see the apple logo)
2. open terminal and give this command :
$ sudo defaults write /Library/Preferences/SystemConfiguration/com.apple.Boot ‘Kernel Flags’ ‘arch=x86_64′
3. open terminal and give this command :
$ sudo nvram boot-args=”arch=x86_64″
All these way will work. First one will boot 64 bit for just this time. Next 2 are permanent solution.
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