Help! Startup disk is full and I can't logon to iMac!

i noticed something eating my hard disk space a few weeks ago. Not sure if something to do with Lion. Now I get this message evrytime I start and I only see gray screen when I logon and I'm not able to continue. Appreciate any advise to solve this problem.

Thanks for the quick response. Additional information to my problem.
my iMac has a 500GB hard disk. It now shows 1.08GB remaining. I ran SupaView and OmniDIskSweeper and both reported disk usage of about 127GB. Where did 373GB go?! It seems that is not being used at all if I look at SupaView.. it stops scanning at 127GB... what's wrong? is my disk damaged?

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My startup disk is full and I can't get into my computer to delete files?

My startup disk is full and I can't get into my computer so I can delete some files???

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Getting messages "startup disk is full" and activity monitor is showing "syslog d" is using a lot of CPU. I'm planning on getting more memory for my late 2008 model Macbook but wondering if there's something that is causing problems that I can also fix.

I had closed out of all of my programs but heard the internal fans running so I checked the activity monitor. It shows syslog d as the top process using the CPU right now. I have no idea what that means.
I read a thread about the startup disk being full and how you can free up memory. I have an airport extreme so TimeCapsule is backing up everything. I do have a bunch of pictures on iPhoto on the laptop; could move those to another location but I'm a little gunshy. I know they are on the TimeCapsule but I would like to save them to a second place before deleting from laptop just to be sure. I went through several things yesterday and emptied trash, etc. I wasn't able to locate the hidden files that the thread about the startup disk being full was referencing --- they were talking about large emails that were causing processes to happen taking up the CPU.... I wasn't able to find out if that was the case for me.
Also I'm going to look into getting another 2MB of memory and installing it on the Macbook, so I can upgrade to the latest OS. Anyone have an idea if that is worth the $$$ over buying a new laptop? Or anyone have ideas as to where to buy memory, etc.
Any ideas - help!

Go step by step and test.
1. Start up in Safe Mode.
    http://support.apple.com/kb/PH11212
2. Empty Trash.
   http://support.apple.com/kb/PH13806
3. Disk space / Time Machine ?/ Local Snapshots
Local backups
   http://support.apple.com/kb/ht4878
4. Delete old iOS Devices Backup.
    iTunes > Preferences > Devices
    Highlight the old Backups , press “Delete Backup” and then “OK”.
    http://support.apple.com/kb/HT4946?viewlocale=en_US&locale=en_US
5. Re-index Macintosh HD.
    This will take a while. Wait until it is finished.
    System Preferences > Spotlight > Privacy
    http://support.apple.com/kb/ht2409

I got a message saying that my startup disk is full and I need to delete files. What files and where can I find them?

I got a message saying that my startup disk is full and I need to delete files. I don't know where to fined the files I need to delete and don't understand how my disk can be full. Can someone help me with this?

To see how much disk space is available ...
Click your Apple menu  top left in your screen. From the drop down menu click About This Mac > More Info > Storage
Make sure there's at least 15% free disk space.
Photos, video, documents, etc. all require disk space.
OSX Tips Where did my Disk Space go?
5 Quick Tips to Free Up Disk Space in Mac OS X
Freeing Up Hard Disk Space - Mac Guides
Never remove any Apple pre installed apps or system files.

When starting the computer, I get a grey screen and following status: your startup disk is full. How can I still enter (in order to free-up some space)?

When starting the computer, I get a grey screen and following status: your startup disk is full. How can I still enter (in order to free-up some space)?

Simple way to make HDD free space is delete files you don't need anymore.
Or get bigger drive and external HDD case, then:
1) install bigger HDD in external drive case.
2) connect external drive and format and mount it with Disk Utility.
3) make clone with Carbon Copy Cloner or SuperDuper!(source drive is internal HDD, target drive is external one).
4) install external bigger drive into your Macbook Pro.
In the cace if your're using Mac Pro:
1) get bigger HDD and install it in drive bay of Mac Pro.
2) format and mount it with Disk Utility.
3) make clone with Carbon Copy Cloner or SuperDuper!(source drive is old HDD, target drive is new one).
4) Select boot drive to new bigger one.

My mac book startup disk is full and when I start it, it give me a blank blue screen. I have tried the shift and I started in safe mode, and it gave me the stars screen. How can I delete files to fix the problem

My mac book startup disk is full and when I start it, it give me a blank blue screen. I have tried the shift upon start
and I started in safe mode, and it gave me the stars screen. How can I delete files to fix the problem

1. Start up in Safe Mode.
    http://support.apple.com/kb/PH11212
2. Empty Trash.
    http://support.apple.com/kb/PH10677
3. Delete "Recovered Messages", if any.
    Hold the option key down and click "Go" menu in the Finder menu bar.
    Select "Library" from the dropdown.
    Library > Mail > V2 > Mailboxes
    Delete "Recovered Messages", if any.
    Empty Trash. Restart.
4. Delete old iOS Devices Backup.
    iTunes > Preferences > Devices
    Highlight the old Backups , press “Delete Backup” and then “OK”.
    http://support.apple.com/kb/HT4946?viewlocale=en_US&locale=en_US
5. Re-index Macintosh HD
   System Preferences > Spotlight > Privacy
   http://support.apple.com/kb/ht2409

Startup disk is full and the laptop can't operate. How I remove files for it to work?

Startup disk is full and the laptop can't operate. How I remove files for it to work?

Can you turn on the Macbook Pro?
If yes, can you see the hard drive icon?
Have you emptied the trash?

My start up disk is full, and i can no longer log in to my username to remedy it. i am abroad and my coverage is about to expire. what to do?

My start up disk is full, and I can no longer access my username to remedy it or remove files. I can only access the guest user profile in safari only mode. I am currently overseas and my coverage expired the day this problem happened. sos what do i do? i need to access iphoto and itunes. and everything else I have

My start up disk is full, and I can no longer access my username to remedy it or remove files. I can only access the guest user profile in safari only mode. I am currently overseas and my coverage expired the day this problem happened. sos what do i do? i need to access iphoto and itunes. and everything else I have

My startup disk is full. I can't open anything to delete.

My startup disc is full and I can't open anything to do some deleting. Can anyone advise .
Thank you

Do you have an external drive? If you do not, strongly recommend you get one. The first step would be to make a back up of your internal hard drive. Of course that assumes you can format the external drive and use Time Machine on the computer in the state it is in now.
Once the back up is done you can try repairing the internal drive so you can start to purge unnecessary files off it.

I can't login, keep geting "Your Startup Disk is Full" and asking me to delete file. if I cant login how can I delete files? Please help

I Keep getting "your startup disk is full" ..... "You need to make more space available on your startup disk by deleting file..." If I can't have an acess, how can I delete files. Please help..

That means the hard drive of your computer is full, and you don't have enough free space on your computer, to do what you are trying to do.
You need to clear up space on your computer.
If you hard drive is full, check the following places to ensure they are not holding unwanted data.
- your trash can in the dock
- if you use iPhoto, your trash in iPhoto - launch iPhoto, and select trash in the left hand column. iPhoto has it's own trash, and is often overlooked
- your download folder - finder / home user / downloads - every time you download something, it stores it here. This is often overlooked as well
- do you have more than one user on the computer? If you do, ensure they are needed. If not, delete them, and the contents of their home folders
If you hard drive is very full, you may want to consider the following:
- putting in a newer larger hard drive - (call you local apple store for prices on this)
- deleting data off your computer
- moving data to an external drive - (iPhoto Libraries, iTunes Libraries or iMovie events, as they are the biggest space hogs)

My Start Up Disk is Full and I can get no acces to anything when the computer starts

The computer turns on and I can get no acces to anything. It display a message "Your Start Up Disk is Full" and comes to a white screen. I can only move the mouse but there is nowhere to click.
How can I delete any files, so the computer can come back to life?? Is there any way I can acces those files??
I'm using 250GB and this Mac has 500GB total memory.

Supposedly one can hold the Shift key down while booting (Safe Mode) and that's supposed to allow one to boot the machine when the startup disk is full.
Step by Step to fix your Mac
If that works, then use a storage drive (not TimeMachine) to move excessive files too likely starting with Movies (large and easy) or iTunes supscirptions downloads which have gotten out of control.
Most commonly used backup methods
Another method is to create a boot drive on a external drive, this then will allow one to option key boot the computer and remove files off of the internal drive, allowing the free space needed for OS X to swap stuff to the drive and operate.
Create a data recovery, undelete boot drive
Now for some reason it takes rebooting the original drive to get OS X to recognize there is free space available again, so reboot the machine normally (no Shift key). Just saying that because you may be wondering how come it does't register when you delete stuff later.

I have 170 go of memory left on my hard disk but it tells me that the disk is full and I can't save anything. What to do?

I have a Macbook pro and a new hard disk was installed last march. Today, I have a message telling me that my disk is full and that I can't save anything. But when I checked my disk to see if I have any space left, it shows 170 go of free space!!!
I have deleted some films, juste to make sure but that did not work...
What can I try to see where the problem is?
Thanks

Download the Windows Installer CleanUp utility from the following page (use one of the links under the "DOWNLOAD LOCATIONS" thingy on the Major Geeks page):
http://majorgeeks.com/download.php?det=4459
To install the utility, doubleclick the msicuu2.exe file you downloaded.
Now run the utility ("Start > All Programs > Windows Install Clean Up"). In the list of programs that appears in CleanUp, select any Bonjour entries and click "Remove", as per the following screenshot:
Quit out of CleanUp, restart the PC and try another install. Does it go through this time?

It says my startup disk is full. What can I do to fix it?

It says my startup disk is full. What should I do to fix it?

Google search on these forums for "start up disk is full". There are a lot of similar discussions.
Related articles:
The X Lab: Freeing space on your Mac OS X startup disk
Where did my Disk Space go?
Use any of the following to analyze the disk usage:
Disk Inventory
GrandPerspective
OmniDiskSweeper
WhatSize

My MacBook Air keeps alerting that the startup disk is full and I've deleted applications, iTunes and MobileSync backups. What else??

I don't consider myself an advanced Mac user but I'm really trying to use my Macbook Air much more than I do... but the biggest hurdle for me is that it's been alerting me that the startup disk has been full for several months now no matter what I do. I'm on 10.9.1 OSX and can't even update to the newer version because I'm always out of space. I have 4GIGs of memory and a 60GB SSD of which 52GB are in use. Using OmniDisk Sweeper, I see I have 14.6 GB in Library of which 8.1 GB is Mail and 5GB is Application Support (and I have nearly 480 MB in Caches and 191 in Containers, 131MB in Messages). As for the rest, I've deleted my iTunes content multiple times but my iTunes library STILL says 1.7GBs in Music. I also have 672MB in Movies which I moved to an external drive and trashed so I'm not sure what still exists here. I only have 2 movie files and I deleted them both! I also have 16.9 MB in hob, whatever that is.
I have 32.8 MB in Logs, 19.8 in Safari, 7.9 MB in Calendars, 5.6MB in Google, 4.3MB in Preferences (!!), and 1.6MB in GameKit (not sure what this is), 1.1MB in KeyChains.
I'm just not sure what's going on. I have everything backed up via SuperDuper on a huge external drive and when I delete on my Mac, it doesn't seem to "take." Is is syncing that's the problem? Are my iTunes music files from my iPhone reinstalling back on the Mac as are all my photos and movies? I don't have that checked in iTunes so that shouldn't be happening either.
Again, I'm not an advanced user so maybe I'm not completing a final step to make sure it doesn't sync with my other devices (I also have an iPad mini). I like to get messages on my Macbook Air when I'm not near my phone but if it means I have 131MB in Messages that I can't pare down, I'd rather not. I see no way to reduce the Messages file so that it's not so large. I definitely want to get a handle on this before I even consider upgrading to a Macbook with more RAM and a bigger hard drive.
Final thoughts: Should I delete my mail accounts and just check mail on the web? Can I delete most of the files in Application Support or leave them alone? What's the difference between the MobileSync files and the MSYNC files?
Thanks in advance for help!

Go step by step and test.
1. Start up in Safe Mode.
    http://support.apple.com/kb/PH11212
2. Empty Trash.
   http://support.apple.com/kb/PH13806
3. Disk space / Time Machine ?/ Local Snapshots
Local backups
   http://support.apple.com/kb/ht4878
4. Delete old iOS Devices Backup.
    iTunes > Preferences > Devices
    Highlight the old Backups , press “Delete Backup” and then “OK”.
    http://support.apple.com/kb/HT4946?viewlocale=en_US&locale=en_US
5. Re-index Macintosh HD.
    This will take a while. Wait until it is finished.
    System Preferences > Spotlight > Privacy
    http://support.apple.com/kb/ht2409

My hard disk is full and I can't get to safe mode

I turned on my iMac (20in 2008 model) and after the apple logo appears, I get a gray screen that says "process 1 exec of sbin/launched failed". I'm pretty sure it's because my hard disk is full. I tried booting up in safe mode, but my wireless keyboard battery died. I put in new batteries, but I need to get to the desktop to reconnect the keyboard. I tried using a usb wired keyboard, but it doesn't power up until I'm on the desktop screen. I don't know what else to do. I need a keyboard to boot to safe mode, but I need to be fully booted to work the keyboard. Any advice would help.

Boot the computer from your OS X installer DVD.
Booting From An OS X Installer Disc
1. Insert OS X Installer Disc into the optical drive.
2. Restart the computer.
3. Immediately after the chime press and hold down the "C" key.
4. Release the key when the spinning gear below the dark gray Apple
      logo appears.
5. Wait for installer to finish loading.
Clean Install of Leopard
     1. Boot the computer using the Leopard Installer Disc or the Disc 1 that came
         with your computer. Insert the disc into the optical drive and restart the computer.
         After the chime press and hold down the "C" key. Release the key when you see
         a small spinning gear appear below the dark gray Apple logo.
     2. After the installer loads select your language and click on the Continue
         button. When the menu bar appears select Disk Utility from the Utilities menu.
         After DU loads select the hard drive entry from the left side list (mfgr.'s ID and drive
         size.) Click on the Partition tab in the DU main window. Set the number of
         partitions to one (1) from the Partitions drop down menu, click on Options button
         and select GUID, click on OK, then set the format type to MacOS Extended
         (Journaled, if supported), then click on the Apply button.
     3. When the formatting has completed quit DU and return to the installer. Proceed
         with the OS X installation and follow the directions included with the installer.
     4. When the installation has completed your computer will Restart into the Setup
         Assistant. Be sure you configure your initial admin account with the exact same
         username and password that you used on your old drive. After you finish Setup
         Assistant will complete the installation after which you will be running a fresh
         install of OS X. You can now begin the update process by opening Software
         Update and installing all recommended updates to bring your installation current.

Help! Startup disk is full and I can't logon to iMac!

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