The last couple of days my IMac 27" (late 2009) started to behave strangely. It was slow with lots of spinning beach balls. Today it got totalle stuck and only resolution was to reset (power button 10 secs). Next boot gave me a startup error: panic(cpu 0 caller 0xffffff800625b0a1): "Unable to find driver for this platform: \"ACPI\".\n"@/SourceCache/xnu/xnu-2050.24.15/iokit/Kernel/IOPlatformExpert.cpp:1514 (more lines with CPU backtrace, kernel info etc). Next thought was reinstall OS (Mountain Lion). I am able to boot from my Mountain Lion recovery drive, but when trying to reinstall I get when selecting drive: "This disk has S.M.A.R.T. error. This disk has a hardware problem that can't be repaired. Back up as much data as possible and replace the disk." Just to be sure, I tried to boot from my old Snow Leopard DVD, but when hitting 'c' on startup after a while, the disc is ejected and boot from main HD is tried (with the above error as result). Running Disk Utility from recovery drive my drive is red text and details sat "This drive has a hardware problem that can't be repaired. Trying to Verify/repair mac partition results in error: "Disk utility stopped repairing "iMac HD" - Disk Utility can't repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files. - The volume iMac HD could not be verified completely." Any suggestions to save data from hard drive? I have a Qnap NAS ready to receive any data I am able to recover, but how (no, I do not a have a Time machine backup ) Any suggestions to something to do/try? Is it a hardware failure, and what are my options?` Please help!