Hello everybody ! I am in trouble and would greatly appreciate any help ! I am a Swiss guy living in a small town of southwest China, thousands of miles away from the nearest Genius Bar…
With my Macbook Pro plugged in, I was downloading an updated version of Skype while doing some routine task at the same time (probably email) and the whole system froze. Keyboard dead. I waited for a while, disconnected ethernet and did a hard shutdown with the power button. Waited a couple of minutes and restarted. Since then…
The Mac powers up but booting freezes half-way ! First chimes OK, startup screen appears with Apple logo and progress indicator spinning for about 1.5 minutes. Then stops spinning. Waiting a long time brings no change. Only way out is a hard shutdown again.
I looked in my OS X book and in Apple support group discussions, then tried a few things (with the Mac plugged in; FileVault is not enabled) :
- Safe mode boot : also gets stuck the same way
- Booting with the original OS X install DVD (10.6.3, about 2.5 year older than the OS X 10.8 version that I am using on the Mac) --> gives me the same startup screen with Apple logo and spinning indicator but, after a while both disappear, leaving an empty screen while the DVD is still making noises. After another while, DVD stops running. That's it.
- Console mode : boots OK, then did a check disk while in console mode, --> "HD appears OK" ! But when I type "reboot" to exit console mode and boot with OS X, it goes through exactly the same problem as above: chimes, indicator spinning then freezes.
- Verbose mode boot: everything goes well for a while, then it gets stuck at : "SMC::smcReadKeyAction ERROR : smcReadDATA8 failed for key MOTP (kSMCKeyNotFound)"
- NVRAM reset ( Command (⌘), Option, P, and R at startup) : the second chimes comes alright but then booting gets stuck like all other attempts.
- Apple Hardware Test with the original Apple DVD : the test boots OK; I did both short and extended memory tests : both cases report one error with code 4SNS/1/40000001:TN1D--18.000
- Since some of these tests were made on day two, I suppose that SMC was reset, but that did not change anything.
This Mac is my workhorse... Many, many THANKS for trying to help !
Lao Bo (that's my Chinese name :-)
I finally was able to copy my critical file from my crippled Mac to my USB drive, while in single-user mode !!!
But it took a lot of work... First we found that the whole file system is read-only by default and must be changed to read-write. Then I discovered that my USB drive was in fact not visible/mounted, and that the MobileBackups Directory had been created by the system within Volumes, on my HD... Finally we found a recipe on how to do it from the start :
I highly recommend it !