I have a 2011 21.5" iMac running OS 10.8 (started on 10.6 i think) with 12 gig ram (2 x 4 g and 2 x 2 g). In the year and a half I've been using it, it has always had occasional kernel panics. I kept the system up to date, submitted reports when it crashed, but never really did anything proactive to solve the issue. Recently, things got much worse.
Two days ago, I got a kernel panic. I restarted the system, and for the first time ever got a kernel panic on the boot up. I then tried booting in safe mode, but still got a KP. I ran the apple hardware test in normal mode and it reported no problems. I then tried running it in extended mode and it froze both times during the ram check (when I say "froze", i mean that the screen did not change after 16 hours and the mouse didn't respond).
I removed the extra 8 gigs of ram and ran the extended AHT on the reduced system. No errors were reported. So i tried booting up again in normal and safe modes, and I still get a kernel panic. Any suggestions?
Here is an abbreviated the panic message (since I'm typing all this out, I'm omitting the memory addresses. let me know if there's something specific that I should include):
Thanks in advance!
Two days ago, I got a kernel panic. I restarted the system, and for the first time ever got a kernel panic on the boot up. I then tried booting in safe mode, but still got a KP. I ran the apple hardware test in normal mode and it reported no problems. I then tried running it in extended mode and it froze both times during the ram check (when I say "froze", i mean that the screen did not change after 16 hours and the mouse didn't respond).
I removed the extra 8 gigs of ram and ran the extended AHT on the reduced system. No errors were reported. So i tried booting up again in normal and safe modes, and I still get a kernel panic. Any suggestions?
Here is an abbreviated the panic message (since I'm typing all this out, I'm omitting the memory addresses. let me know if there's something specific that I should include):
Code:
panic(cpu 2 caller 0x...): Kernel trap at 0x..., type 6=invalid opcode, registers
CR0:0x... CR2:0x... CR3:0x... CR4:0x...
RAX:0x... RBX:0x... RCX:0x... RDX:0x...
RSP:0x... RBP:0x... RSI:0x... RDI:0x...
R8:0x... R9:0x... R10:0x... R12:0x...
R13:0x... R14:0x... R15:0x... R16:0x...
RFL:0x... RIP:0x... CS:0x... SS:0x...
CR2: Error code:0x0000000000000000, Faulting CPU: 0x2
Debugger called: <panic>
Backtrace (CPU 2), Frame: Return Address
0x... : 0x...
0x... : 0x...
0x... : 0x...
0x... : 0x...
0x... : 0x...
0x... : 0x...
0x... : 0x...
0x... : 0x...
0x... : 0x...
Kernel Extensions in backtrace:
com.apple.driver.AppleIntelSNBGraphicsFB(7.3.2)[...]
dependency: com.apple.iokit.IOACPIFamily(1.4)[...]
DSMOS has arrived
dependency: com.apple.iokit.IOPCIFamily(2.7)[...]
dependency: com.apple.iokit.IOGraphicsFamily(2.3.4)[...]
BSD process name corresponding to current thread: kernel_task
Boot args: -x
Mac OS version:
11G63b
Kernel version:
Darwin Kernel Version 11.4.2: Thu Aug 23 ...
Kernel UUID: ...
System Model name: iMac12,1 (Mac-...)Thanks in advance!