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jstinehelfer
jstinehelfer, Mac Support Specialist
Category: Mac
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Experience:  A+ Comptia Certified computer repair
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Customer Question

My Mac will not boot.

I think it is related to permissions, but I have been unable to find an answer that has worked.

When I start in verbose mode (cmd + v), after com.apple.launchd crap, I see this:
Running fsck on boot volume...
** /dev/rdisk0s2 (NO WRITE)
** Root file system
Executing fsck_hfs [..etc..]
/dev/disk0s2 on / (hfs, local, journaled)
mount: realpath /none: No such file or directory (I think this is a problem)
Bug: launchctl.c:2069 (25182):2: fwexec(mount_tool, NULL) != -1
BootCacheControl: Unable to open /var/db/BootCache.playlist: 2 no such file or directory

Apart from that, everything looks normal.

It never boots - I left it for 2 hours straight. I have repaired permissions with Disk Utility, using repair permissions and ACLs from "resetpassword" panel.

It is worth noting that when I run fsck -fy / myself from single user mode, the first time round it always says **FILE SYSTEM MODIFIED** or whatever, but the second time it "appears to be OK". However, it wont continue to boot after "exit".
Also, after rebooting, it appears to go back to saying **MODIFIED** on the first run.

I suspect I have done something with permissions here. Help please :l
Submitted: 2 years ago.
Category: Mac
Expert:  jstinehelfer replied 2 years ago.

jstinehelfer :

Hello, My name is XXXXX XXXXX I am an expert with JustAnswer.com. Thank you so much for using our services. I do believe I can help you with your problem today. Please do not click the Accept button until you are satisfied with my help.

jstinehelfer :

When you ran Disk utility did you do this with in the OSX or have you tried to use your Mac OSX disk that came with your computer?

Customer :

No, I have Lion installed so I used the recovery partition (Hold cmd+r before the apple sign/chime)

Customer :

And chose "disk utility" from the menu that appears

Customer :

I am backing up my hard disk to an external drive, but I would prefer not to need to reinstall Lion. I will only reinstall lion if you can guarantee that my files will NOT be removed/wiped when I reinstall Lion, because it contains a lot of important information that is not backed up, as well as the inconvenience of needing to redownload/install large applications such as Xcode, Adobe Web Premium Suite and large games

Customer : I appreciate that this is not a great photo, but my camera finds it difficult to adjust properly to the screen. If you open this image in full screen, you should be able to read it.
Customer : http://db.tt/8E22ZA8g
Customer : Its the verbose mode output. You can see the problem at the top of the screen.
Customer :

Oh, and if it helps, I have Ubuntu Linux live CDs if it will help. It can connect to the internet, download, install, run packages as root without making changes to the hard drive. I have tried using "TestDisk" from the LiveCD to fix it, but that hasn't done anything either.

jstinehelfer :

Sorry I did not realize you made a response. I was not thinking of re installing Lion at the present time. I just would like to see you boot to the Mac osx disk and run the disk utility from there. Do a repair etc

jstinehelfer :

I use this link to help fix most of my apple problems. Look down a little ways for the Disk Utility section. But this article explains most things that go on with Lion

Customer : This article did not really help. I cannot boot into OSX to run disk utility from there so I can only run it from the recovery partition (lions equivalent of the installation cd). I have tried repairing and fixing permissions using disk utility but it made no difference. I had also run fsck -fy and that doesn't help. It says "volume header needs minor repair", repairs it, and on the next run the disk appears healthy. However, after a reboot, it still says the header needs minor repair.
Customer : I believe I had this problem before witt snow leopard - when it booted, a progress bar appeared below the spinner, but got stuck at one point, but I never checked the problem. I just reinstalled snow leopard after (amazingly) compressing 250gb of data into 159.8Gb, just enough to fit on my 160gb external drive.
Customer : The last thing I remember doing was compiling a program in Xcode, then I opened something else which crashed. I tried to open it again, but all I saw was high CPU in activity monitor and no crash report window. There were two processes, "crashreporter" one owned by me and the other by root. They were using about 40% and the other was using about 60% CPU, so combined, they used about 100% constantly. I left it for a reasonable tile but they did not stop so I quit them. Within seconds, they were back and back using 100%, so I logged off. However, I saw a spinner when I logged off, which is strange because I wasnt shutting down. It was like that for 5 mins or so, so I got bored and turned if off with the power button for a hard reboot. But then, it just would not boot.
Expert:  Rachel-Mod replied 2 years ago.

Hi, I’m a moderator for this topic and I wonder whether you’re still waiting for an answer. If you are, please let me know and I will do my best to find another Expert to assist you right away. If not, feel free to let me know and I will cancel this question for you. Thank you!

Customer: replied 2 years ago.
I have resolved my issue now, without the help of this expert - I resolved it in my own time because I could not wait.

FYI - I used Disk Utility in recovery mode to make a disk image of Macintosh HD onto an external hard drive for a backup, just in case.

I then ran "Reinstall OS X Lion" from the Recovery Drive and let it run through the install process. It does NOT erase your files, it only replaces the system files, so I did not (in theory) need the backup. I would recommend to anyone else with any similar problem to BACK UP THEIR HARD DRIVE before running Reinstall Lion, just in case it does erase your files.

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jstinehelfer
jstinehelfer
Mac Support Specialist
647 Satisfied Customers
A+ Comptia Certified computer repair