How do you check to see if you're in 64-bit mode?

[Boesky]

I pressed the 6 and 4 buttons when booting up, but I am not sure if it loaded into 64-bit mode. It did take significantly longer to boot up though... isn't 64-bit supposed to be faster?

 

[benlangdon]

you can check if your are running 64 bit?

 

[calderone]

System Profiler --> Software --> 64-bit Kernel and Extensions:

Yes or No.

 

[Boesky]

everything says yes, but this time when i booted up, i didnt hold down 6 and 4

 

[NT1440]

Apparently I've been booting into 64 bit this whole time since I did it just to check it out.

 

[calderone]

Apparently I've been booting into 64 bit this whole time since I did it just to check it out.

Check /Library/Preferences/SystemConfiguration/com.apple.boot.plist

For:

<key>Kernel Flags</key>
<string>arch=x86_64</string>

 

[NT1440]

Check /Library/Preferences/SystemConfiguration/com.apple.boot.plist

For:

<key>Kernel Flags</key>
<string>arch=x86_64</string>

Mine says

<key>Kernel Flags</key>
<string></string>

 

[benlangdon]

ugh...
my computer can run 64 bit, i checked when i downloaded snow leopard.

but it says no.
ummm...

 

[maflynn]

I prefer using the terminal command uname -a to determined if I booted my MBP in K64

 

[toolbox]

From what i have read out there in the internet land only machines with core 2 duo processors are able to run the 64bit kernel Core duo systems are not.

SL does not activate support for 64 bit out of the box unless your using a xserve. i had to download a program to make the setting for me.

 

[*LTD*]

This is all you need:

http://www.ahatfullofsky.comuv.com/English/Programs/SMS/SMS.html

An excellent little utility.

 

[Advil]

i just installed that utility and started to boot up in 64 bit mode. what is the advantage of this? i've been installing 64 bit applications when available, will they be more responsive now or something?