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Imac locks up

I have been working on this problem for several days.

When I allow my Imac to go to sleep it locks up when I try to boot up it won't.The only way I can get into it is to go into safe mode or go directly into disk utility by holding the control and r while starting.

I have done the following things

1: repaired the hard drive and verified the hard drive repaired the permissions and verified the permissions. each time I do this there are repairs needed. After the repairs I can start up and use the computer as if nothing is wrong, a couple of times I have stalled and the computer slows down with the rotating beach ball and I have to go back and do repairs again.


2: I have disconnected all of the peripherals except the keyboard and the wireless touch pad. Problem doesn't go away.


3:I have reinstalled mountain lion 3 times


4: I have replaced the time machine drive with a brand new drive


5: I have ran 'tune up my mac" after the last repair and it has just happened again.


When I do all of the repairs they are successfull and I can work with the computer for quite some time before having a lock up and it always occurs if let it go into sleep mode

I am considering virus protection but I dont want to waste any more money on a problem that may be a hardware problem.


Any help would be gratefully received.

imac, Mac OS X (10.5.2)

Posted on Sep 25, 2012 4:24 PM

Reply
21 replies

Sep 25, 2012 5:07 PM in response to BDAqua

See if the Disk is issuing any S.M.A.R.T errors in Disk Utility...


http://support.apple.com/kb/PH7029


Boot off your *original* Install Disk while holding down the *d key*, (not c key), then run the extended Apple Hardware Test. Some disks require you to use the Option key at bootup to select AHT. Some Discs have it inexplicably on Disc #2. Some models have a separate AHT CD.


The Memory test can really only be trusted if it finds a problem, not if it doesn't find a problem. 😟


Memtest OS X...


http://www.memtestosx.org/joomla/index.php


Rember is a freeware GUI for the memtest ...


http://tech.kateva.org/2005/10/rember-freeware-memory-test-utility.html

Sep 25, 2012 6:08 PM in response to xscottish

Disk Warrior is an expensive and specialized application whose only use is to try to recover data from a damaged volume that Disk Utility can't repair, and for which there are no backups. It's not a maintenance tool; it's a recovery tool. If you have adequate backups — which means multiple backups — you’ll never need a recovery tool, and therefore Disk Warrior is useless to you. Don't waste money on it. Spend the money on backup drives instead.

Sep 27, 2012 1:28 PM in response to Linc Davis

The problem continues, It appears to happen after the computer has gone into sleep mode. I have checked the hard drive each time and now there are no errors. I purchased "Rember" and had it check all of my memory with all tests for 30 cycles. everything seems to be ok.

I am now testing to see if it is related to my email . I have closed email (which I usually leave on ) and I am letting it go into sleep mode. Next I will close Safari and let it go into sleep mode.

The computer performs fine while I am using it

I have not purchased Disk Warrior, since I have not had any disc errors since and my computer does not appear to hae lost any data.

This is a mystery, I would take it to the apple store but I think that it is something I am missing


I forgot to comment that the disc is not issuing any SMART errors

Sep 28, 2012 9:59 AM in response to xscottish

Please read this whole message before doing anything.

This procedure is a diagnostic test. It won’t solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.

Third-party system modifications are a common cause of usability problems. By a “system modification,” I mean software that affects the operation of other software — potentially for the worse. The following procedure will help identify which such modifications you've installed. Don’t be alarmed by the complexity of these instructions — they’re easy to carry out and won’t change anything on your Mac.


These steps are to be taken while booted in “normal” mode, not in safe mode. If you’re now running in safe mode, reboot as usual before continuing.


Below are instructions to enter some UNIX shell commands. The commands are harmless, but they must be entered exactly as given in order to work. If you have doubts about the safety of the procedure suggested here, search this site for other discussions in which it’s been followed without any report of ill effects.


Some of the commands will line-wrap or scroll in your browser, but each one is really just a single line, all of which must be selected. You can accomplish this easily by triple-clicking anywhere in the line. The whole line will highlight, and you can then either copy or drag it. The headings “Step 1” and so on are not part of the commands.


Note: If you have more than one user account, Step 2 must be taken as an administrator. Ordinarily that would be the user created automatically when you booted the system for the first time. The other steps should be taken as the user who has the problem, if different. Most personal Macs have only one user, and in that case this paragraph doesn’t apply.


Launch the Terminal application in any of the following ways:


☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)


☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.


☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.


When you launch Terminal, a text window will open with a line already in it, ending either in a dollar sign (“$”) or a percent sign (“%”). If you get the percent sign, enter “sh” and press return. You should then get a new line ending in a dollar sign.


Step 1


Copy or drag — do not type — the line below into the Terminal window, then press return:

kextstat -kl | awk '!/com\.apple/{printf "%s %s\n", $6, $7}'

Post the lines of output (if any) that appear below what you just entered (the text, please, not a screenshot.) You can omit the final line ending in “$”.


Step 2


Repeat with this line:

sudo launchctl list | sed 1d | awk '!/0x|com\.(apple|openssh|vix)|edu\.mit|org\.(amavis|apache|cups|isc|ntp|postfix|x)/{print $3}'

This time, you'll be prompted for your login password, which won't be displayed when you type it. You may get a one-time warning not to screw up. You don't need to post the warning.


Note: If you don’t have a login password, you’ll need to set one before taking this step. If that’s not possible, skip to the next step.


Step 3

launchctl list | sed 1d | awk '!/0x|com\.apple|edu\.mit|org\.(x|openbsd)/{print $3}'

Step 4

ls -1A /e*/mach* {,/}L*/{Ad,Compon,Ex,Fram,In,Keyb,La,Mail/Bu,P*P,Priv,Qu,Scripti,Servi,Spo,Sta}* L*/Fonts 2> /dev/null

Important: If you formerly synchronized with a MobileMe account, your me.com email address may appear in the output of the above command. If so, anonymize it before posting.


Step 5

osascript -e 'tell application "System Events" to get name of every login item' 2> /dev/null

Remember, steps 1-5 are all drag-and-drop or copy-and-paste, whichever you prefer — no typing, except your password. Also remember to post the output.


You can then quit Terminal.

Imac locks up

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