4
votes
9answers
766 views

What is wrong with my iMac? (video corruption, unstable)

I have a 24" Early 2009 iMac. During "intensive" use (such as Photoshop, WebGL, etc.), the system starts to become very unstable, resulting in bizarre graphics corruption and other weird behaviour. ...
2
votes
2answers
2k views

What do I do when OS X freezes?

It happened to me twice recently. I was just using my iMac normally, like browsing the web, and it suddenly freezes. I can move the mouse, but I can't click on anything. Keyboard not functioning at ...
1
vote
1answer
2k views

iMac doesn't start, all i see is colored lines and then checkered lines on a white background

I have iMac 2010 which is out of warranty. I recently came up to the computer and it was sleeping and was not waking up. I held the powered button for a while, so it turned off. Then I pressed it ...
0
votes
1answer
207 views

Freezing, disk i/o problems iMac

I have a desktop iMac with Snow Leopard installed on it. Every few minutes, I get freezing and "kernel disk0s2: I/O Error" in my console. I did some research, and found that my hard drive (a WD I ...
1
vote
0answers
521 views

27" 2009 iMac screen occasionally freezes (mouse still moves) after upgrading RAM and SSD

I have a 2009 iMac that has been working fine (but slowly) until now. I decided to upgrade the hard drive to a 500 GB Intel SSD (MZ-7TD500BW) and put in 16 GB of RAM (PNY Optima PC3-8500). I've ...
1
vote
0answers
241 views

OSX freezes upon USB connect

On a new (end 2012) iMac 21" with OSX ML as delivered I performed a migration from a backup drive that contained a bootable clone of the old machine, OSX 10.6.x, Users, Application, Libraries, etc, ...
0
votes
1answer
481 views

iMac freezing with graphical artifacts, what to do?

My iMac 27" from 2011 has recently been experiencing random freezes. It either restarts or I am forced to reboot (holding power button several seconds). When frozen the iMac does not respond to pings ...
1
vote
0answers
232 views

iMac hanging on startup

I've got a 2011, 21.5" iMac with a 1TB hard drive (likely Seagate, although I don't think I can check right now). After it froze, I did a cold restart by holding down the power button for a few ...
1
vote
0answers
158 views

iMac 2011 spinning beach ball after login

the following is the HW profile of my iMac: Hardware Overview: Model Name: iMac Model Identifier: iMac12,1 Processor Name: Intel Core i5 Processor Speed: 2.5 GHz ...
2
votes
1answer
280 views

Faulty 2006 iMac - what is it useful for?

I own a 2006 iMac, which, alas, has a known manufacturing fault. Because of the poorly-designed cooling system, the graphics card (soldered to the motherboard) has become defective and the system ...
0
votes
1answer
172 views

Vertical lines on iMac

I have vertical lines showing up on my 2.16 GHz 2 GB RAM Core 2 Duo iMac. Any idea what's going on and what I need to do to fix it? My computer is also freezing frequently.
4
votes
4answers
3k views

Why does my iMac freeze since I upgraded to Lion? And how can I fix it?

My iMac (late 2009) worked great with Snow Leopard. After upgrading to Lion I am loosing the Mac vs. Windows war at home. The iMac freeze except for the mouse. The only thing to do is to restart with ...
8
votes
4answers
2k views

iMac inconsistenly hanging and showing beach ball

This past week, I've been having constant problems with my 2007 Aluminium iMac (2.4GHz, 3GB memory, 320GB HDD). I've been downloading using Transmission, and when (sometimes) stopping or starting a ...
1
vote
2answers
2k views

Hard drive is failing, iMac is freezing?

So this is my third hard drive that I installed on my intel Mac OS X desktop (made in 2007), and I installed Western Digital Black Caviar (which is supposed to last 3 yrs, I believe). But the hard ...
6
votes
3answers
2k views

How bad is it for a Mac to forcefully restart it when it freezes?

I have a 2011 27" iMac running OS X Lion. There is a known bug when iMac, after waking up from sleep mode, freezes while playing video (Flash in my case). It does not respond to any key combination ...
9
votes
5answers
9k views

IMac freezing intermittently--every few minutes. How can I fix this?

A couple of days ago, I was browsing, and downloading something from Usenet, when my iMac all of a sudden froze up, grinding to an unbearable slowness. After trying to tolerate what was happening for ...
3
votes
2answers
371 views

Aperture and iTunes freezing, bringing down Snow Leopard entirely

I've got a 27" dual-core iMac of the generation before the current one. HDD is 2 TB, RAM is 8 GB. I've got Aperture 3 installed and updated, with a photo library totaling 180 GB. With increasing ...