Reminder to self. Never set the permission of the /

In a lapse of judgment, I set my hard drive permission to disable readonly for all user, except myself & admin (Using hard drive get info – sharing & permission ). The reasoning was because I can see my root when I enable wireless sharing.

It turned out to be a very bad decision though, my computer won’t boot up anymore. Luckily, I found some helps in the internet.

* first go into single user mode (by pressing command-s during bootup
* mount -a
* mount -uw
* chmod 755 /
* halt

and then restart your computer.

I hope it will fix your problem.