I'm using Mac OS X 10.6.7. on new Macbook Air (4GB). It won't boot with 64 bit kernel no matter what! my need is not a performance problem. I need to install "Togl" from source code and it won't get through unless the computer is in 64 bit kernel mode. It can be forced to boot in "64 bit kernel boot mode" but will still run with "32 bit kernel" (according to "Startup Mode Selector.app"). So the "uname -m" command gives "i386" as output. I need to get the output to be "x86_64" to be able to compile Togl. Can someone help please???