My flat mate just bought a new MacBook Pro and her mum is having her old MacBook. She tried re-installing Mac OS X from Install Disc 1, followed the on disc installation app. and restarted. Her problem was that after restarting, the disc would eject and display a panic message, the top line being; panic(cpu 0 caller 0x00431DA3): "Unable to find driver for this platform: \"ACPI\".\n"@/SourceCache/xnu/xnu-1228.4.20/iokit/kernel/IOPlatformExpert.cpp:1407 So I tried it a few times, dis-abled extensions during boot up, attempted booting from disc via key command (C) and safe boot up. After these I attempted starting the MacBook in FireWire target mode, erasing the hard drive, opening the installation app. via my MacBook Pro but to no avail. The disc wouldn't load after restart, just a plain white screen on which eventually using the option key I was able to boot from Macintosh HD. Current situation, MacBook has no OS, trying to use the Disc to reinstall is proving to be a no go because of the above and any help would be well appreciated.