yeah, it was a x64 that booted in a 2008 unibody macbook, and didnt boot in my 2007 2.4ghz macbook pro. I also tried the 32bit version in my 2007 MBP and it also didnt boot, but also was recongized and read. Always the "No bootable device --" error... Says to insert disk and hit
any key. No key works. Also tried a variety of USB booting attempts to no avail. Did not want to ...