I've been trying to reinstall, but I keep getting this error message. panic(cpu 0 caller 0x563ec9): "Unable to find driver for this platform: \"ACPI\".\n"@/SourceCache/xnu/xnu-1504.14.2/iokit/Kernel/IOPlatformExpert.cpp:1387 Debugger called: <panic> Backtrace(CPU 0), Frame : Retrun Address (4 potential args on stack) 0x549e3da8 : 0x21b837 (0x5dd7dc 0x549e3ddc 0x223ce1 0x0) 0x549e3df8 : 0x563ec9 (0x5e7188 0x6266500 0x549e3e28 0x62d9900) 0x549e318 : 0x543f80 (0x631c400 0x62c8d80 0x1 0x506b96) 0x549e3e78 : 0x542157 (0x62c8d80 0x631c400 0x62d9940 0x50aa5e) 0x549e3f28 : 0x542709 (0x62c8d80 0x62cfbc0 0x8 0xffffffff) 0x549e3f78 : 0x5443f5 (0x62c8d80 0x0 0x549e3fac 0x1) 0x549e3fc8 : 0x2a179c (0x62662d0 0x0 0xdfa45e25 0x95b995b9) BSD process name corresponding to current thread: Unknown Mac OS version: Not yet set Kernel version: Darwin Kernel Version 10.7.3: Sun Mar 6 13:3941P (A pop up blocks the rest of this line) System uptime in nanoseconds: 527952830 The pop up says: "You need to restart your computer. Hold down the Power button until it turns off, then press the Power button again." and then in other languages it repeats itself. Any help is appreciated. At this point I just want to reinstall or do a fresh install I figured that by formatting my hard drive I'd be able to do a fresh install but it's not looking like it.