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Setting up kernel boot architecure in mac osx permanently without worrying about holding 32 or 64 keys during the mac system bootiing

Now you are not required to hold 32 or 64 keys on keyboard to boot the snow leopard into respective OS mode. Run the below command to set the kernel boot parameter.

sudo systemsetup -setkernelbootarchitecture i386 | x86_64

Snow leopard will boot in respective os mode from next reboot onwards.


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How to find firmware or boot ROM version in Mac OS X

Firmware and boot ROM version of your mac can be found in two ways.
Way 1 :
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On the right side panel Under hardware overview section, we can see Boot ROM Version and SMC (Firmware) Version.

Way 2 :
Run the below command in terminal to get boot ROM version and SMC(firmware) version :
$ system_profiler SPHardwareDataType | grep -i "Version" | awk -F ':' '{print $1 $2}'

How to boot into recovery mode on mac without holding Command + R Key on keyboard ?

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sudo nvram "recovery-boot-mode=unused" sudo reboot