![]() but unless something is electrically shorting out, it shouldn't cause anything of this nature right? I did remove an EFI program called rEFIt recently, though I did so on 2 machines running the same backup image and the other one (early 2011 mbp) has no issues at all so far. It seems to me like a hardware issue, and I have noticed the headphone jack acting up here and there, cutting out when plugged in, removing volume control until fiddled with. ![]() This happens on normal boot, from the recovery partition, internet recovery, and a USB installer. The computer worked rock solid for about a week then gave me the exact same error message. Booting in verbose mode, I can see the first error is ACPI Error: Hardware did not change modes (20140828/hwacpi-ea) followed by a few other ACPI Errors and then the panic with backtrace. I reformatted the drive, did a clean install of Snow Leopard (without the original install disk, as I didn't have one handy at the time). Panic(cpu 0 caller 0x563ebd): "Unable to find driver for this platform: computer will not boot, gives me the startup tone, then the apple, then this stack trace and error message on a gray screen. I've owned this computer for over 3 years with 0 issues, and just recently received: io platform panic action AppleAHCIDiskDriver My efi partition was working fine until a few days ago when i closed my lid and opened it up back up.
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