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bjf123
We Want... A Shrubbery
Premium
join:2000-02-11
Hamilton, OH

iMac Problem

I've got an iMac that is starting to freeze up. Over the last few days, I've had to hold the power button to shut it down when everything froze. Even Force Quit would freeze. This has happened every day this week. The system is probably 4 or 5 years old and had a new hard drive installed earlier this year. I've repaired permissions and verified the disk and found no problems. Any ideas?
--
Golf is a relatively simple game, played by reasonably intelligent people, stupidly.


tmpchaos
Requiescat in pace
Co-Lead Mod
join:2000-04-28
Hoboken, NJ

Pull and re-seat the ram?



lordpuffer
RIP lil
Premium
join:2004-09-19
Rio Rancho, NM
kudos:1
Reviews:
·CableOne
reply to bjf123

FWIW, I initially installed Lion right over Snow Leopard on 2 iMacs. Later on, after experiencing some issues, I did a fresh install of Lion, and the OS worked a lot better.

You could also try running OnyX. Don't know if it will help with your issue. It may also freeze up while running it. However, if you want to give it a shot:

»www.macupdate.com/app/mac/11582/onyx
--
Obama in 2012 - There's No Tea Left In The Bag.



bjf123
We Want... A Shrubbery
Premium
join:2000-02-11
Hamilton, OH

I've installed OnyX and run a number of diagnostics and maintenance tasks and no problems were reported. I also cleaned all the caches. I'll try reseating the RAM later today when I've finished working.

I did upgrade to Lion right over Snow Leopard. While I know that a clean install is always better, I really don't want to spend a day reinstalling all my software assuming I can find the original media, restoring my music to iTunes, and photos to iPhoto.
--
Golf is a relatively simple game, played by reasonably intelligent people, stupidly.



Post Op
Premium
join:2001-11-06
inside out
reply to bjf123

You now have the perfect excuse to buy a new Macbook Pro with retina display.
--
I'd rather have a bottle in front of me than a frontal lobotomy.



bjf123
We Want... A Shrubbery
Premium
join:2000-02-11
Hamilton, OH

The thought had entered my mind, but being unemployed makes it unlikely.



dellsweig
Extreme Aerobatics
Premium,MVM
join:2003-12-10
Campbell Hall, NY
kudos:1
reply to bjf123

said by bjf123:

I've got an iMac that is starting to freeze up. Over the last few days, I've had to hold the power button to shut it down when everything froze. Even Force Quit would freeze. This has happened every day this week. The system is probably 4 or 5 years old and had a new hard drive installed earlier this year. I've repaired permissions and verified the disk and found no problems. Any ideas?

Not sure of the max ram for your model iMac but 3 gigs for a Nix system like Lion - I would consider marginal. Your system may be swapping badly and appearing to freeze.

I have 16 gigs on my iMac and will be pushing that to 32 in the near future.
--
Nothin' left to do but smile smile smile


bjf123
We Want... A Shrubbery
Premium
join:2000-02-11
Hamilton, OH

According to the specs, the max RAM for my iMac is 4GB. There are only two slots and each can only have a 2GB stick.
--
Golf is a relatively simple game, played by reasonably intelligent people, stupidly.



lordpuffer
RIP lil
Premium
join:2004-09-19
Rio Rancho, NM
kudos:1

You can also try starting up in Safe Mode. That resets a few things:

»support.apple.com/kb/HT1455
--
Obama in 2012 - There's No Tea Left In The Bag.



Thinkdiff
Premium,MVM
join:2001-08-07
Bronx, NY
kudos:11
reply to dellsweig

said by dellsweig:

Not sure of the max ram for your model iMac but 3 gigs for a Nix system like Lion - I would consider marginal. Your system may be swapping badly and appearing to freeze.

I have 16 gigs on my iMac and will be pushing that to 32 in the near future.

Highly, highly doubt this. I've pushed my machines hard in the past with less RAM. The UI rarely freezes up due to swapping.

On Linux, yes. Happens all the time. Not so much on OS X.
--
University of Southern California - Fight On!


Thinkdiff
Premium,MVM
join:2001-08-07
Bronx, NY
kudos:11
reply to bjf123

What graphics card does your iMac have?

I have a slightly older iMac that would randomly freeze up as well. Turns out some of the new ATI drivers Apple has been using in 10.6.x and 10.7.x really suck.

I reverted back to the older drivers - no more freezing.
--
University of Southern California - Fight On!



bjf123
We Want... A Shrubbery
Premium
join:2000-02-11
Hamilton, OH

According to the system info, it's an ATI Radeon HD 2600 Pro with 256MB of VRAM.



Thinkdiff
Premium,MVM
join:2001-08-07
Bronx, NY
kudos:11

Yep. That's the one.

You could give this a whirl and see if it works:
»discussions.apple.com/thread/238···tstart=0

The thread is quite long. People on 10.7.4 are reporting this fix still works, but it may need to be applied twice (with a restart in between) in order to full take effect.
--
University of Southern California - Fight On!



bjf123
We Want... A Shrubbery
Premium
join:2000-02-11
Hamilton, OH

I've installed the old drivers. We'll see what happens.



Post Op
Premium
join:2001-11-06
inside out
reply to bjf123

I have probably the same iMac. I bought it in January 2008. I had the hard drive replaced a few months ago at my local Apple Store, I have 4GB of ram in mine. Currently I have no problems whatsoever but who knows. I have Lion installed as an upgrade to Snow Leopard as well. I am very interested in you finding a solution.
--
I'd rather have a bottle in front of me than a frontal lobotomy.



bjf123
We Want... A Shrubbery
Premium
join:2000-02-11
Hamilton, OH

Well, I just had to hold down the power button to force a reboot on my iMac. The screen was again frozen. This is getting annoying.
--
Golf is a relatively simple game, played by reasonably intelligent people, stupidly.



RiseAbove
Premium
join:2004-01-30

said by bjf123:

Well, I just had to hold down the power button to force a reboot on my iMac. The screen was again frozen. This is getting annoying.

boot to the CD, zero out the drive, then install the OS again. Sounds like you got something in the OS locking everything down. The only time my old iMac ever locked up was when I was using Transmission for torrenting and I had to many peers and seeds open.


Irish Shark
Play Like A Champion Today
Premium,MVM
join:2000-07-29
Las Vegas, NV
kudos:4

1 edit
reply to bjf123

I had the same issue a while ago. I did a disk repair, and that fixed it.

»www.apple.com/osx/recovery/

EDIT: The link says Mountain Lion, but it is the same for Lion.
--
"You can observe a lot by watching". Yogi Berra


macaholic
Premium
join:2003-08-31
Jackson Heights, NY
reply to bjf123

A memory or video memory problem would give you the obnoxious black restart screen... lock up like this are IO related. I agree with folks who suggest its your hard drive.
--
"You don't subject minority rights to a referendum." Justice Minister Irwin Cotler of Canada



jrs8084
Premium
join:2002-03-02
Statesville, NC
kudos:1
Reviews:
·AT&T U-Verse
reply to bjf123

Freezing is often hardware. RAM is the usual culprit, although bad Mobos and video cards can do the same. (that era iMacs weren't as we'll known for that)

It could be even something as simple as an old wired mouse with fraying wires-saw that cause a freeze on more than one Mac.



cableties
Premium
join:2005-01-27
reply to bjf123

First, have you run any diagnostics?
Second, BUY a good disk utility (actually, buy BOTH Disk Warrior and Drive Genius)
Third, buy a small USB external and install a CLEAN OS on it, along with those TWO utilities you bought. Boot from that, repair.
If you run the AHT (Apple Hardware Test), it is a minimum test that can atleast determine if hardware issue.
Lastly, because your iMac is more than 2 years old, you can burn a CD of Memtest+ and run that to see if and which Module of ram might be bad (as suggested by other).

Honestly, we are force to replace our Macs every 4-5 years now. With the Release of 10.8, cpu/EFI requirements are "herding" us into buy-replace even if working just fine. (your 3 Gig ram now is under what is needed to run the OS and apps...but fine for when it was out ... running 10.4 or 10.5...)
--
Splat



bjf123
We Want... A Shrubbery
Premium
join:2000-02-11
Hamilton, OH

I've run Disk Utility to verify and repair the disk and permissions. I can't get AHT to run. I've tried both methods I saw in the Apple support doc, holding down D while starting the system and also holding down option D to try running AHT from the web. Neither works and the system just boots normally.

I'm currently unemployed so I don't have $170 for Disk Warrior and Drive Genius. I'm running a memory test.
--
Golf is a relatively simple game, played by reasonably intelligent people, stupidly.



cableties
Premium
join:2005-01-27

Disk Utility is ok for permissions but sucks at directory/drive structure repairs that DW and DG excel at. Many times, Disk utility would error that that data needs to be backed up and drive reformatted when DW or DG would fix the issue.

It's one thing to have bad blocks (DG will check for that) and another to just have a volume/bundle error.

Sometimes, OWC has specials that you can get Drive Genius cheap. Aside from your employment situation (sorry), those are what I recommend.

(if you ever formatted your hard drive, the AHT could be missing. I don't know which iMac or version OS X you have or what OS came with it, but either the System DVD or the Applications DVD has it on it to boot from. I also know that it is BEST practice to use a USB Apple keyboard, not a wireless one or 3rd party, to use keyboard startup commands (like PRAM, or SMC resets).

More on the AHT here: »support.apple.com/kb/ht1509
--
Splat



bjf123
We Want... A Shrubbery
Premium
join:2000-02-11
Hamilton, OH

said by cableties:

(if you ever formatted your hard drive, the AHT could be missing. I don't know which iMac or version OS X you have or what OS came with it, but either the System DVD or the Applications DVD has it on it to boot from. I also know that it is BEST practice to use a USB Apple keyboard, not a wireless one or 3rd party, to use keyboard startup commands (like PRAM, or SMC resets).

More on the AHT here: »support.apple.com/kb/ht1509

I had a new hard drive installed by the Apple Store earlier this year when the original drive started to fail. I guess they didn't install the AHT option when they put Lion on it. I am using the original Apple keyboard and mouse. I've also tried resetting the PRAM. At this point, maybe I should just upgrade to Mountain Lion and see what happens?
--
Golf is a relatively simple game, played by reasonably intelligent people, stupidly.


cableties
Premium
join:2005-01-27

If you have a damaged directory or issue with the drive, I would NOT install a new OS. If there are bad blocks, it will make matters worse. Plus without making sure your RAM isn't a problem...without testing...

If you have the original DVDs, you can boot from them to run AHT.

Is there anyone near you that has these Mac Utilities to verify if there are any issues?

Since you upgraded Snow to Lion, did you verify you don't have any old extensions left behind? Did you install Combo update for late update (10.7.4)? Are you sure the OS isn't causing the freeze?
If its hardware, I would run diags on RAM. if you can't then ... sorry, I don't know much more to diagnose without ruling out RAM, drive or other (thermal...board...).
--
Splat



bjf123
We Want... A Shrubbery
Premium
join:2000-02-11
Hamilton, OH

I ran a memory test and everything checked out OK. I do have the Snow Leopard DVD. Could I boot from that to run AHT even though the system is actually running Lion? I have no idea how to find if I have any old extensions left behind. My upgrade to 10.7.4 was done using the normal software update process. I've got a few friends who run Macs. I'll see if any of them have DW or DG.

One thing I've noticed is that a number of times when the system freezes, I've just opened Chrome. I'm going to try staying away from it to see if that makes a difference. I doubt if it will, but you never know.
--
Golf is a relatively simple game, played by reasonably intelligent people, stupidly.



RiseAbove
Premium
join:2004-01-30

said by bjf123:

I ran a memory test and everything checked out OK. I do have the Snow Leopard DVD. Could I boot from that to run AHT even though the system is actually running Lion? I have no idea how to find if I have any old extensions left behind. My upgrade to 10.7.4 was done using the normal software update process. I've got a few friends who run Macs. I'll see if any of them have DW or DG.

One thing I've noticed is that a number of times when the system freezes, I've just opened Chrome. I'm going to try staying away from it to see if that makes a difference. I doubt if it will, but you never know.

I will say it again, boot to DVD, go to security options and zero out the drive, then install brand new OS. From there either upgrade all the way to Mountain lion or just use it. See if a fresh install will do anything. Also I would avoid using a time machine backup image to load all your stuff back when you are done. You want to start with a clean build and stay with that to see if it is hardware or software related.


bjf123
We Want... A Shrubbery
Premium
join:2000-02-11
Hamilton, OH

If you're saying I shouldn't use a TM backup to restore my stuff, how do you recommend putting the thousands of photos, my music library, documents, etc. back on the iMac?
--
Golf is a relatively simple game, played by reasonably intelligent people, stupidly.



Post Op
Premium
join:2001-11-06
inside out

Call the local Apple store and see if you can have a genius look at it. Bring your iMac, install discs and external hard drive with you.
--
I'd rather have a bottle in front of me than a frontal lobotomy.



RiseAbove
Premium
join:2004-01-30
reply to bjf123

said by bjf123:

If you're saying I shouldn't use a TM backup to restore my stuff, how do you recommend putting the thousands of photos, my music library, documents, etc. back on the iMac?

You can put it back on there but for now just use the computer to see if it is stable as a fresh install. Plus if you have ever gone into a TM backup file you can easily see all of your information and just drag and drop it back into it's right spot or use Migration Assistant and do it later down the road.