I am trying to fix my brother's white macbook running what I assume is OS X Panther (2006). He is receiving a kernel panic error: "You need to restart your computer. Hold down the Power button for several seconds or press the Restart button." This pops up right away after booting and the apple logo. Restarting results in the same error every time. Holding shift for safe mode only gets me the same error. I have tried resetting PRAM - same error. Since I can't put the install disc into the computer without getting into the OS, I am using an external DVD drive to boot using the install disc. Holding Option and choosing the install disc results in the same kernel error. Holding Shift while booting from the install disc finally yielding some more pertinent information I hope someone here can use to tell me what to do: Code: panic(cpu caller 0x003A9241): Unable to find driver for this platform: "ACPI". Debugger called: <panic> Backtrace, Format - Frame: Return Address (4 potential args on stack) 0x24e6bdf8 : 0x128d08 (0x3c9a14 0x24e6be1c 0x131de5 0x0) 0x24e6be38 : 0x3a9241 (0x3edf20 0x3680790 0x24e6be68 0x36a7140) 0x24e6be58 : 0x38aff0 (0x36ad900 0x3664c80 0x1 0x3be425) 0x24e6beb8 : 0x38c86f (0x3664c80 0x36ad900 0x36abc00 0x36a9de0) 0x24e6bf38 : 0x38c0d7 (0x3664c80 0x36875c0 0x8 0xffffffff) 0x24e6bf88 : 0x38d81c (0x3664c80 0x0 0x134c09 0x38d742) 0x24e6bfc8 : 0x19a6ec (0x3680400 0x0 0x19d0b5 0x367eb70) Backtrace terminated-invalid frame pointer 0x0 Kernel version: Darwin Kernel version 8.8.3: Wed )ct 18 21:57:10 PDT 2006; root:xnu-718.104.22.168bj~4/RELEASE_I386 My brother says the laptop worked fine this morning. He didn't install anything, didn't rename files, didn't move files or folders anywhere... So here I am with no options left. I can't boot into safe mode. I can't boot from install disc. I can't go into target mode because I can't get into the OS. So what can I do?