Id command in single user mode produces "bus error"

See title.
I discovered this while fsck'ing some disks today.

you have to load DirectoryServices before the command works.
try
mount -uw /
launchctl load /System/Library/Launchdaemons/com.apple.DirectoryServices.plist
id

Similar Messages

Need to figure out how to remove an unknown admin password on a mac. used the install disc with not luck. tried some commands in single user mode, no luck.

need to figure out how to remove an unknown admin password on a mac.
used the install disc with not luck. tried some commands in single user mode, no luck.

need to figure out how to remove an unknown admin password on a mac.
used the install disc with not luck. tried some commands in single user mode, no luck.

Back up files through Single user mode

Hello there,
it seems that I have problem with my hard drive. I tried to repair it with disk utility and the fsck command in Single user mode with no luck. The fsck command gives me the "Exited with signal 8" message and it won't start up the usual way or under Safe boot so I came to the conclusion to back up my files on an external drive and reinstall the system. I need step by step instructions how to back up the entire hard drive onto the external drive in Single User mode.

Do you have another mac with firewire?
Try target disk mode.
If you have a second Mac computer, you may want to try to copy over as many files you can. One way is to use target disk mode.
http://support.apple.com/kb/HT1661
http://lowendmac.com/misc/06/0710.html
This requires you to use your installation disk. With errors from fdsk, I do not think you will be able to copy all directories. I used a flash drive. A harddrive should be the same. To copy everything, use the directory /Volumes/Macintosh-HD
You may try to recover your data by booting up an installation cd/dvd and using the terminal.
You could try getting into the Unix command line interface and copy some files or directories.
You can copy files on the Unix command line interface if you placed the flash drive the USB port before powering on your machine.
Boot up your installation CD or DVD. To do this, place to the CD or DVD its drive. Power off the the machine. Hold down the c key then power on your machine. After you specify the language you will come to the installation panel. Do not install. Go to the top of the screen and click on the tools menu item. Click on Terminal to use the command line interface.
You should verify that the files have been copied correctly by trying them in another Mac before it the deleting the original.
*Here is an overview of the commands.*
Lets assume that the problem account has a short user name of mac.
#Copy directory "/Applications/Applescript files" to
# directory "/Volumes/Spotless/Applescript files".
# "Spotless" is my flash drive.
ditto -X -rsrc /Applications/Applescript\ files /Volumes/Spotless/Applescript\ files
#cd is change directory
cd /Volumes/COPYIT/answers/
# pwd is print working directory
pwd
#the ls command is for list
# l is long
# a to show hidden files. not shown in this example.
# F is type of file where / is directory
sh-2.05b# # Please note ls is the list command. l is a lower case L
sh-2.05b# ls -lF
Here is what these commands mean:
cd is change directory
pwd is a print working directory
ls is list
sudo is Super user do
# The sudo command will ask for your administration password. No characters will appear when typing your password. Press return when done typing.
cp is copy
copy a file example:
sh-2.05b#
sh-2.05b# cd /Volumes/Macintosh-HD/Users/mac/desktop
sh-2.05b# pwd
/Volumes/Macintosh-HD/Users/mac/desktop
sh-2.05b# cp -i answers.txt /Volumes/SpotMore
Will copy the file answers.txt in the directory SpotMore.
Some files have a space in the name. You need to escape. see example:
mac $ ls -l ~/"see it"
-rw-r--r-- 1 mac staff 3171 Oct 26 23:38 /Users/mac/see it
mac $
mac $ cd /Users/mac/Desktop/ttt\ html\ copy/
Do you know about tabing? Type in a few letters of a name then press the tab key. The computer will type out the rest of the name if it is unique.
The up arrow key will retrive the previous command. You the left arror and right arror keys to move around. Use the delete key to delete a character to the left.
<eol>
*More examples and moving around*
sh-2.05b# pwd
sh-2.05b# ls /Volumes
.Trashes Classic Macintosh-HD
._.Trashes Mac OS X Install DVD SpotMore
sh-2.05b#
sh-2.05b# df -h
Filesystem Size Used Avail Capacity Mounted on
/dev/disk4s3 2.6G 2.5G 89M 97% /
devfs 121K 121K 0B 100% /dev
fdesc 1.0K 1.0K 0B 100% /dev
<volfs> 512K 512K 0B 100% /.vol
/dev/disk5 467K 9.0K 435K 2% /Volumes
/dev/disk6 95K 64K 27K 70% /private/var/tmp
/dev/disk7 95K 14K 77K 15% /private/var/run
/dev/disk3s1 3.7G 1.3G 2.5G 34% /Volumes/SpotMore
/dev/disk0s10 1.1G 1.1G 3.4M 100% /Volumes/Classic
/dev/disk0s12 70G 45G 25G 65% /Volumes/Macintosh-HD
sh-2.05b#
sh-2.05b# cd /Volumes/SpotMore/
sh-2.05b# pwd
/Volumes/SpotMore
sh-2.05b# # Please note ls is the list command. l is a lower case L
sh-2.05b# ls -l
total 880
-rw-r--r-- 1 unknown unknown 6148 Sep 10 2010 .DS_Store
drw------- 4 unknown unknown 136 Aug 25 2010 .Spotlight-V100
drwxrwxrwt 3 unknown unknown 102 Sep 3 2010 .TemporaryItems
d-wx-wx-wt 3 unknown unknown 102 Sep 10 2010 .Trashes
drwx------ 3 unknown unknown 102 Sep 3 2010 Desktop
-rw-r--r-- 1 unknown unknown 18944 Aug 27 2010 Desktop DB
-rw-r--r-- 1 unknown unknown 2 Jul 29 2010 Desktop DF
-rwxrwxrwx 1 unknown unknown 26281 Oct 27 2009 Warranty Information.PDF
drwxr-xr-x 13 unknown unknown 442 Aug 4 2010 backup
drwxr-xr-x 13 unknown unknown 442 Aug 4 2010 backupPrior
drwxr-xr-x 7 unknown unknown 238 Aug 27 2010 cons
drwxr-xr-x 65 unknown unknown 2210 Sep 4 2010 iMac-back
... clipped ...
sh-2.05b#
sh-2.05b# cd /Volumes/Macintosh-HD/Users/mac/desktop
sh-2.05b# pwd
/Volumes/Macintosh-HD/Users/mac/desktop
sh-2.05b# # Please note ls is the list command. l is a lower case L
sh-2.05b# ls
Z2300 iMac
.DS_Store move
.FBCIndex new Belward
.FBCLockFolder primary-comments-new copy.doc
Consolidate-rc primary-comments-new.doc
Downloads psc 1200
... clipped ...
sh-2.05b# ditto -X -rsrc iMac /Volumes/SpotMore/iMac-back
sh-2.05b#
sh-2.05b# # Please note ls is the list command. l is a lower case L
sh-2.05b# ls -h /Volumes/SpotMore/iMac-back/
total 2800
-rw-r--r-- 1 unknown unknown 24K Sep 12 2010 .DS_Store
-rw-r--r-- 1 unknown unknown 2K Apr 18 2010 Differentiate Between Models .html
... clipped ...
sh-2.05b# pwd
/Volumes/Macintosh-HD/Users/mac/desktop
sh-2.05b# ls
Z2300 iMac
.DS_Store move
.FBCIndex new Belward
.FBCLockFolder primary-comments-new copy.doc
... clipped ...
sh-2.05b#

IMac G5 won't boot in normal and safe mode, but will from single-user mode

Hello everyone,
I'm quite new here, so I try to do my best if you have a question.
Yesterday, someone nearby me had a iMac G5 (Powermac8,1), and he sayd, that the computer sometimes will boot, sometimes not.
I did test it, I thought it was running fine, but when I played some music in iTunes, it was stuck on 9 seconds, and crashed (with a kernel panic). The guy also sayd, that there was nothing important on the computer, so a clean install was fine.
Now, the problem is, that it will not boot in normal mode (without anything pressed on boot), also it won't in safe mode (shift-boot), but it will, when I enter single-user mode, mount the hard drive and exit from single-user mode so it will go futher on booting. Sometimes it will not, and immediately gives you a kernel panic in single-user mode, but it will 90 percent of the time.
Then you've got another problem: when it's running in the normal desktop from single-user mode, it'll be stuck after some time again. If I look into the Kernel Panic file created, most times it's because of Spotlight indexing, so I disabled that.
He also gave me the disks (Apple Hardware Test and Extra Applications, and iMac G5 Mac OS X Install Disks 1-3) that came with the Mac. He sayd that I could use them, but I think he didn't test out the SuperDrive, because when I insert a disk, it will try to read, but it will make 2 same sounds, and quits after 10 tries, when it will spit the cd out. Also normal (audio) disks.
Also, I must hurry with the commands for mounting and exiting in single-user mode, or it will just not boot.
In all cases, after 30-45 seconds from pressing the power button, the fan will start blowing at full speed, and it will stop after the exit command in Single-user mode. That's weird.
I can't do anything with the SuperDrive, I can't normally boot in Mac OS X except for Single-user mode (but I don't think he would like to do that every time the computer boots up), and I have very limited time when Mac OS X arrived on the desktop.
When booting in Verbose mode, it will be stuck on this:
AppleSMU::PMU vers = 0x000d004c, SPU vers = 0x15, SDB vers = 0x01,
(and sometimes ends with a kernel crash by fsck_hfs)
Things I've tried (without any success):
- /sbin/fsck -fy (in single-user mode)
- Disabling Spotlight and mds
If you want some more information, feel free to ask!
Greetings
-MrYoranimo
PS: My main language is Dutch, so my English can be bad at some points.

Thank you for your support! This reply is a little bit late, because I was to the camping this weekend.
The only thing I sure do know, is that the iMac has a bad SuperDrive. That's one problem, but I don't really wanna use it, and you fix everything by Single-user mode and when I get to the desktop to test things and change stuff in the Preference Panes.
What also came to my mind was that there also is a problem with the videocard (driver), because sometimes when I boot into Single-user mode, I can see some white pixels which aren't supposed to be there. And when booting from SUM you can see that some of the colors are different and there are weird patterns on the screen.
I also tried to setup a NetBoot server on this computer (MacBook Mid 2010) with just Lion 10.7.4 on it, but I'm not that expert and I didn't really find the good posts on the Internet, although I tried it with the Server applications and both Server applications and DeployStudio. But I didn't succeed.
I don't really like buying a new FireWire hard disk or external FireWire dvd reader/writer, except if it has USB support, because my MacBook doesn't support FireWire, and I really wanna make use of it then.
If I know more or have fixed it, I will surely post again here with what I did to fix it (if no one else has posted here already ).

Macbook shuts off during start-up - can't get through safe-mode, single user mode (fsck -fy) and target-drive shows no problems when running disk utility repair

Hi everyone,
I'm simply all out of ideas on what to do - my best guess is the problem is not specifically hard-drive related since all the 'normal' fixes just won't work.
What could be the cause of my issue? The only way i've managed to keep the Macbook Pro on for longer than a minute is through target drive, where it seems to work just fine - i can access everything. To sum up everything:
1 - I tried resetting the PRAM
2 - I tried to go in to safe mode, it shut off before i could type the password
3 - I tried fsck -fy command from single user mode, sometimes i can get to actually typing it but mostly it shuts off before
4 - I tried to repair disk via target drive - success, no problems detected (and it didnt fix my issue)
5 - I reinstalled OS Mavericks.
The Macbook Pro previously had some problems with the power-button not working properly (a mac-cunning friend of mine had to open up the mac and start it by swiping to metal pins on a specific (battery/power?) part inside it. The problem kinda went away afterwards but it might be related to this?
This is way off my comfort zone of 'diagnosing' issues, so I'm crossing fingers for some good advice.
Thanks,
Aske
Denmark

I think you're right.
If it's hardware related, is it possible to guess at what it might be? It would be nice to know how much I should expect to pay for a repair before actually getting it fixed.

Repair Permissions in Single User Mode

So, I have searched various posts and have yet to find anything that has worked so far. Hopefully, someone can still help. I recently made the mistake of changing my permissions on my hard drive. I clicked "Get Info" for the Boot volume and changed the permissions for "Everyone." I thought I had corrected it, but now when I try to boot, it just sits at the apple grey screen with the spinner and never loads the OS. Judging from other comments, this appears to be a permissions issue and all I need to do is repair the permissions which is why I ran through these commands in Single User mode:
/sbin/fsck -fy<return> --I did this twice to fix the drive
/sbin/fsck -fy<return>
/sbin/mount -uw<return>
/sbin/autodiskmount -va <return>
/usr/sbin/diskutil repairPermissions /<return>
sudo diskutil repairPermissions /
I am having to run through the Single User mode because I do not have the SL install disk. However, I have Windows installed on a Boot Camp partition and I can access files on the mac side but everything is read only.
I am a novice at the command line so any guidance on what commands might help to repair permissions would be great.

Found this for Leopard. Will probably work in 10.6
Run these commands and hit enter after each. Be careful with the spaces; keep exactly as written. There are various suggestions in this thread, which you might first want to check out, but this seems to be the most promising.
http://forums.macnn.com/90/mac-os-x/370223/changed-hd-permissions-mac-wont-get/
mount -uw /
chmod 775 /
chmod 1775 /
Then restart
BTW, not recommended to repair Permissions from the install disk, since if you've updated since installing, those will be out of date and incorrect. Permissions Repair should be done from the normal boot volume.
Message was edited by: WZZZ

Unable to start in single-user mode - HD dead?

My MacBook Pro (Mac OS X) refused to start, it hung up on the loading screen where you see the apple and the spinning loading wheel. I found out how to fix this, I had to go into single-user mode and type "/sbin/fsck -fy" to repair/verify the disk (I was unable to do so from the Disk Utility via the Install Disc, the repair/verify buttons were just grayed out).
Anyways, doing this from the command line (single-user mode) fixed the problem and I could boot into Mac OS X (there were more issuses after this point which forced me to do an "Archive and Install").
^ that happened a week ago. And happened again yesterday, hung up on the exact same point. So I boot up my Mac into single-user mode, and type in "/sbin/fsck -fy" to start the process. Different from last time, I got a lot of text this time. It also kept going for a longer while. After about 10 minutes, there was a couple of minutes where nothing happened. So I typed "/sbin/fsck -fy" again (as I'm supposed to do so until it says "** The volume (nameofvolume) appears to be OK"), and I got some more text, then nothing happened for a while.
Inpatient as I am, I considered the process to be complete, and restarted my Mac by typing "exit".
I think I ****** up my Mac OS X partition at this point. Because when I try to start my Mac now, it automaticly boots into Windows XP (my other partition). Also I cannot enter single-user mode or Verbose mode, the Mac just ignores and goes right into Windows XP.
I've tried to boot from the Install Disc. When I run Disk Utility, the "HD"(name of Mac OS X partition) is grayed out. I can't do an Archive and Install because it cannot detect my main partition.
An interesting thing though: When I have the Install Disc inserted, I can enter single-user mode (by holding cmd+s at startup). However, when I type /sbin/fsck -fy, it starts verifying the Install Disc rather than the HD.
Also when I open My Computer in Windows XP, I can see the other partition (MacDrive). When I select it, I see:
Free Space: 219GB
Total Size: 168GB
This indicates that my HD is dead/erased, and that my last three months of work is gone. This just because I'm impatient, and didn't wait for the fsck process to complete.
What is the next step? How can I get into single-user mode so that I can verify/repair my disc?

On the point of contacting the folks at Alsoft, I have found that they seem to be unobtainable on www.alsoft.com at present.
I wanted to get in touch as I had a small problem with Diskwarrior on updating to 10.5.5 from 10.5.4 ,
Disk permissions ends with an error code.
I wonder if there were so many queries re this that they are unobtainable?
I run 3 machines from a wireless router, an iMac, an HP laptop with XP and a totally obsolete Dell into which i have squeezed W2000, with a resultant mix of browsers but no contact with the folks at Alsoft.
Am I in a minority of one here?

Please help why doesn't command s single user work?

Why doen't my mac command s single users mode not work?? i forgot my admins password and i broke the disc like 3 months ago so im left with no choise
please help asap

Single user or verbose mode is for troubleshooting, not changing the admin password.
According to your profile you are runing Lion so an alternative may work for you.
OS X Lion: Apple ID can be used to reset your user account password
Or here > Reset a Mac OS X 10.7 Lion Password

I changed my wheel group properties to no access at top disk level. I messed up, how can I change back in single user mode "command s" as I am now in Thailand and not able to access startup disks?

I messed up, I changed my "Wheel group" properties to No Access ( or something other than the default) at the top level of my startup disk "Macintosh HD".   Now my computer won't start up, I just get the spinning wheel of death.    I also am in Thailand right now, so I cannot go to a Genius at an apple store, nor do I have startup disks available.
So I was hoping there was a way to change back the properties of my disk (Volume) in single user mode (via Command +s) during startup, i.e. can I do a chmod command on the Macintosh HD listing under the Volume Directory.    Or where do i fix this?   Is it fixable without startup disks, etc...
THANKS FOR ANY HELP!!!!
If you could also please let me know you have an answer, I WOULD REALLY APPRECIATE IT!!!
thanks so much
mark
<Edited by Host>

Thomas,
Thanks for the info on command-R, didn't know about that!!!
Yes I changed the sharing "Wheel Group" permissions on my hard drive via Get Info.    But that's all I did.    And then most of the apps wouldn't respond with anything.    So not knowing I did something stupid, I decided to re-boot, and then nothing but the Wheel of Death at startup.
I was trying to limit access to my computer on this network, changed my public folder settings, and then I thought why not the whole hard drive, but at that time I had no idea what the "Wheel Group" was... so I shouldn't have touched it, BUT IT DID ...... argggggg....
I managed to go to an internet cafe & research the problem yesterday.    I used the command +s single mode to get in, and then did the necessary steps to mount the drive so I could make changes.   I basically did this:
Boot into single-user mode (boot while holding down CMD-S)
Follow the on-screen instructions to mount the file system as read-write (a fsck command followed by a mount command)
Type the following: "chmod o+r /" followed by "chmod o+x /"
Type "exit" to leave single user mode and complete the boot sequence.
I found it at this link http://forums.macrumors.com/showthread.php?t=416180
It worked... thank God!!!   Well so far so good.
I was going to try my own fix by chmod on the Hard drive listed under Volumes directory, but that doesn't seem to match the info under Get Info Window.    So I just used the fix above.    I probably should now go and do "Disk Utility - repair permissions", however I am a little gun shy right now, so I will probably wait until I am back in the States so I can go to an Apple store if it messes up.   Right now I'm following the "if it ain't broke, don't fix it" MOTTO...
So Thomas I just wanted to say THANKS for replying so quickly, and I really appreciate your help!!!
(yes I know I shouldn't have used my email addresses, but I WAS DESPERATE, but that's still no excuse)
Hopefully maybe this thread will help someone else out in the future....
Okay, thanks again!
Mark

Single user mode doesn't accept commands

Due to some kernel panics with an old G5 iMac, I wanted to run the memtest utility. After an initial test in a Terminal, I wanted to try again in single user mode, just to be sure.
Had no problem at all starting up (Cmd+S), didn't get any error messages in the boot messages. The ":/ root" prompt appears and I can enter commands. Yet no matter what I enter, I immediately get returned to the shell prompt. Command line editing works (emacs commands, clear screen etc.). Due to the lack of delay (even when e.g. entering "sleep 10"), I don't suspect it's just the output of the shell command that gets lost, it's not accepting anything at all, prompt doesn't reflect "cd" changes, nothing…
New install of Leopard, all updates applied, permissions repaired.

I can't picture what is doing this other than something missing or muxed, but perhaps it's time for a relatively painless Archive & Install, which gives you a new/old OS, but can preserve all your files, pics, music, settings, etc., as long as you have plenty of free disk space and no Disk corruption, and is relatively quick & painless...
http://docs.info.apple.com/article.html?artnum=107120
Just be sure to select Preserve Users & Settings.

Transfer file in Single User Mode (Command S)

Can I mount my iPod as external drive and transfer my documents in Single User Mode? or any other mode? I just cannot login as normal. I want to backup my docs before refresing the OS.

You say 'Documents' not 'Music' so I hope you mean files stored on there using it in Disc Mode not iTunes files?
Boot in Single User Mode
at the root# prompt enter
CD /Volumes
ls
And see if a) the iPod shows and b) your backup drive shows
If so, the basic command is cp source destination but you must give the complete and correct paths here so post the drive names if you need clarification.

Single user mode . using tail -f (command not found)

Have an empty computer with no systems disk as the installation CD start up will not go past the grey screen with the rotating logo before the panic crash page comes up and tells me to restart the computer.
Trying to boot into single user mode and then use the command tail -f to see contents of some of the logs... BUT I get the reply tail command not found ????

If the hard drive is empty, then you can only boot from the CD. Regardless of whether or not it has "tail," it won't do you any good. There are no logs.

Command Line Expert Needed: Deleted hostconfig (+ others) - boots to single user mode only !

Mac OS X Tiger 10.4.11
Deleted folders/files when logged in as root user. (don't ask!)
On restart , wont boot up , get grey screen with white apple logo the black screen with command line: localhost:/ root#
Started up from install cd - repaired permissions (ran twice) & verified hard drive . All okay.
Restarted but still goes back into command line with same localhost:/ root prompt
Tried a bunch of different things as per advice on these boards - discovered that there is no hostconfig file.
Restarted into verbose mode.
Here are the lines that i think may reveal exactly what I messed up - and hopefully someone out there has an idea how I can try to fix without having to do an archive/install.
BSM auditing present
disabled
rooting via boot-uuid from /chosen: (here a very long string of numbers and letters looks like a password)
Then a long line about
"got boot device = IOService:/MacRISC2PE ........."
Then, the following
"BSD root: disk0s3, major 14, minor 2"
"CSRHIDTransitionDriver::stop"
"IOBluetoothHCIController::start Idle Time Stopped"
(AND HERE'S THE BIGGIE:)
/etc/rc: line 93: /etc/hostconfig: No such file or directory
Apr 1. 06:01:44 launched: /bin/sh on /etc/rc terminated abnormally, going into single user mode
localhost:/ root#
I'm pretty sure I messed thing up pretty well - was mainly network/server folders and files - definitely samba, which I think I deleted, and under "network" in the finder, I also might have deleted my computer from the server list
As an aside in case this provides any insight, when I go to the terminal app when starting up from install cd, the prompt reads :
"bash-2.05b"
I'm also able to see the contents of my hard drive when using disk utility from install cd and and trying to "mount image" ---
Everything looks intact in terms of folders/files in my user account, but in the /root folder, there's only /library - which is empty.
Any help, insight, troubleshooting and even scolding - will be welcome! I need this thing booted
Cheers

I do not have a backup. Should I back up before I try doing a reinstall of the os x?
That's also known as shutting the barn door after the horse has bolted.
It can't hurt, but it's not going to help much.
Camelot: when you say "apps and user content should stay intact" - doesn't sound very definitive. Are there any variables that come into play?
No.. generally it's pretty reliable, but yours is an odd situation. I wouldn't expect to lose any user data, just CYA
I do have a start up disk along with some apps that I created in retrospect many years ago ....(I think it's os x 10.2.8) Can I use this to boot up and then just navigate to my user files so I can get some things done that I need to?
Unlikely. For one have you even tried restoring from your Retrospect backup? (it's not the most reliable system).
Secondly, you can't boot from your Retrospect backup, so you'll need to restore that system to boot from it. Have you got a second disk to restore to (you do NOT want to restore 10.2.x over your 10.4.x system).
in terms of "random deleted files" : not entirely random
Ok, maybe not entire random, but it's also somewhat unknown. You need to have some idea of what files you're trying to restore, but if you haven't got them in a backup where are you going to get them from?
You cannot just take old copies from your 10.2.x system and hope they'll work (in case that's what you're thinking).
The BEST solution is to boot from the 10.4.x installer disk and let it do its thing.
And for what its worth, Unauthorized access attempts, in and of themselves, are not a cause for concern since they were clearly caught by the OS. It's the access attempts that succeed (and are not logged) which are more of an issue.

Why won't single user mode recognize /sbin/mount command?

I need help from people who are knowledgable abou these Mac wonders of the world and single user mode.
I'm trying for the life of me to run "memtest" in single user mode and am finding it impossible.
After I boot into single user mode, I get a "Shell>" prompt.
I type in /sbin/fsck/ -y to do some check thing. I then type in /sbin/mount -uw /
Both times I get an error saying that "/sbin/yada yada yada is not recognized as an internal or external command, batch or whatever"
No command work at all. I have no clue what I'm doing and am using instructions from where I got the memtest app. Sure I could just run it from the Terminal but then you're not testing all of the RAM, only the available portion. There's a huge chunck that won't be tested as OSX is using it. I want to do this as I just upgraded RAM to 8G with Crucial and now my MBP is acting very slow and weird.
HELP???? Why does this have to be sooooo hard.

I found the solution to the problem. Somone on a different forum had the same issue at one time. The problem is my use of Refit. When you hold Command-S at start when using refit you go into a single user type mode inside the refit shell. So it is something different.
Instead I needed to let the Mac boot Refit like normal. With the Mac partition highlighted press "F2" and it will display boot options for the Mac partition. One of them is Mac OSX single user mode. Simply select and hit enter and then I enter the correct single user mode and I'm off.
Then everything works like it should. I was my own undoing with my use of Refit.

Booting in single user mode to trouble shoot grey screen the boot stops at "CODE SIGNING .... clearing CS_VALID" will not command c past - stuck

booting in single user mode to trouble shoot grey screen the boot stops at "CODE SIGNING .......... clearing CS_VALID" - cannot command C past - just stuck

Hi opjml0,
Welcome to the Apple Support Communities!
If your Macbook is starting up to the gray screen, I suggest the steps in the following article.
Mac OS X: Gray screen appears during startup
http://support.apple.com/kb/ts2570
I hope this helps,
-Joe

Id command in single user mode produces "bus error"

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