Boot Snow Leopard into 64Bit Mode

The default mode for the new Snow Leopard install is 32bit mode.

Want to change that and upgrade to 64bit.

Simply change one line in the  /Library/Preferences/SystemConfiguration/com.apple.Boot.plist file and your Macintosh will boot into 64bit mode.  With most recent Mac's you'll see a significant performance improvement , of course the more memory you have the better and results may vary.  You can always switch back using this method

FROM THIS

________________

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple$

<plist version="1.0">

<dict>

        <key>Kernel</key>

        <string>mach_kernel</string>

        <key>Kernel Flags</key>

        <string></string>

</dict>

</plist>

________________

TO THIS

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<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

<plist version="1.0">

<dict>

<key>Kernel</key>

<string>mach_kernel</string>

<key>Kernel Flags</key>

<string>arch=x86_64</string>

</dict>

</plist>

________________

Any text editor should work or you can simply use PICO by typing the following in terminal along with your root password.  

sudo pico /Library/Preferences/SystemConfiguration/com.apple.Boot.plist

-ZuCom

http://www.zucom.com

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