![]() ![]() ![]() ![]() If you start up from a different disk, the setting on that disk, or the hardware default, will take effect. Note: This setting is stored in the /Library/Preferences/SystemConfiguration/ file and will take effect every time you start up from this disk. Mac OS X 10.5.6 Combo Update is Apples recommended update for Mac OS X Leopard 10.5.0. Sudo systemsetup -setkernelbootarchitecture i386 ![]() To select the 32-bit kernel for the current startup disk, use the following command in Terminal: Sudo systemsetup -setkernelbootarchitecture x86_64 Click the below link to download the free utility. It can extract, list, and convert image files (including ISO, BIN, DAA, NRG and other image formats). This is a free command line utility which runs on OSX. To select the 64-bit kernel for the current startup disk, use the following command in Terminal: Download PowerISO Command Line Utility for OSX. Your Mac will revert to the default kernel the next time you reboot it. If your Mac uses the 64-bit kernel by default, you can start up with the 32-bit kernel by holding the 3 and 2 keys during startup. If your Mac uses the 32-bit kernel by default, but supports the 64-bit kernel, you can start up using the 64-bit kernel by holding the 6 and 4 keys during startup. 32bit mode lets you also execute 64bit apps. Lion still has both kernels, so yes you can run in 32 or 64bit mode. ![]()
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