After I power on and type my password, there is a progress bar under my username. The progress moves from left to right and after finishing normally it would present my desktop. Now it goes to about 75% and then the system powers off completely.

I would like to know how I can recover from this.

I have tried to login to Disk Utility from the Recovery Mode. I am able to see my disks and click First Aid > Run and it says the HDD is all good.

Based on Comments

After doing syslog | grep -i "shutdown cause" as suggested by @allan, it found pci pause SXDC. Googleing, that I found this Reddit comment which says

Boot in single user mode [and execute the following commands]
mount -uw /
mv /etc/launchd.conf /etc/launchd.conf.old

In my case I don't even see the /etc/launchd.conf file.

  • Type the following command: syslog | grep -i "shutdown cause" and post the results. You may also want to run Apple Hardware Test (AHT). Hold the D key while booting from a powered off state with the AC adapter connected. – Allan Sep 8 '16 at 17:21
  • @Allan can you please let me know how to get the syslog? i am running the AHT test right now will post the results – SeanClt Sep 8 '16 at 17:25
  • Use Terminal. Type that command exactly as you see it. You can send the output directly to your clipboard for pasting into your original question by appending | pbcopy to the command. – Allan Sep 8 '16 at 17:27
  • it says pci pause sdxc updating questions with what i did with this message – SeanClt Sep 9 '16 at 0:51
  • Can you post the output to the question, please? – Allan Sep 9 '16 at 2:41

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