Hello! With Disktool you can leave one half of your disk empty. pdisk should be able to create another partition and label it as some kind of UNIX/Linux. Finally Brian Bergstrand's ext2fsx https://sourceforge.net/projects/ext2fsx/ can format and mount this ext2 or ext3 partition. You could also boot from CD/DVD into some Linux and start to install on this empty partition. The most minimal Linux could be deleted afterwards with ext2fsx -- Greetings Pete