OS X :: IMac Freezes On Restart

Jan 6, 2011

I have a 3.06 Intel Core 2 Duo iMac with Snow Leopard. It is completely up-to-date and has always ran beautifully. I have not installed any new programs lately. Recently, when I go to APPLE > Restart (maybe after an update or just because I like to restart my computer on occasion) the bar at the top disappears, my dock stays up on the screen, and the computer just sits there and freezes up on me. I am forced to hold down the button on the back to get my computer back. Here are the things I have tried:Re-install of the latest update using Combo Update Reset PRAM Repaired Permissions Booted from disk and ran a Repair Disk Complete zero-out of the HD, clean install of Snow Leopard, and reinstallation of everything from a Time Machine backup Nothing has worked...The other problem is that it only happens when my computer is on for several days. If I restart daily, it doesn't happen. So, it makes it hard for me to log-in as a different user for that long to initiate the problem. I think it has something to do with a program that I may open and close throughout the week but I have no way to pinpoint what program it is.

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IMac :: Freezes On Startup - Restart To Start Working

Mar 22, 2009

Almost every other day when I start up my iMac it freezes and I have to restart it to get it working. Can anyone offer me any advice on this?

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OS X Yosemite :: IMac Retina Freezes And Restart Randomly On Clear System

Dec 2, 2014

my iMac random freeze and restart, on console i not see any message about kernel panic and etc system clear install ! what's happened ?   

log1  System Version: OS X 10.10.1 (14B25) 
Kernel Version: Darwin 14.0.0
Boot Mode: Normal
Model: iMac15,1
RAM details...[code]....

iMac, OS X Yosemite (10.10.1)

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OS X Mavericks :: Frequent White Screen Crashes / Restart Freezes On IMac - 10.4.9

Aug 25, 2014

Since the last itunes update (May be a co incidence) , my 27" Mac keeps crashing with a white screen and flickering   It then wont restart most times, even when using boot up options such as option, Cmd P+R. even removing power!waiting and restarting etc on most restarts wont work its a white screen.

iMac (27-inch Mid 2011), OS X Mavericks (10.9.4)

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MacBook Air :: Computer Freezes And Need To Restart

Jun 13, 2008

What does this error message mean? I have had my MBA since Feb, and never had this error. I get the error, in several languages, and the computer is frozen at that point. A restart gets me back up and running until it happens again, usually within; an hour or so. Always while using Safari.

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Intel Mac :: It Keeps Freezing Up And When Restart It Freezes Up Also?

Jun 25, 2012

it keeps freezing up and when restart it freezes up also

iMac, Mac OS X (10.7.4)

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MacBook Pro :: Yosemite Freezes And Restart OS?

Dec 5, 2014

Before two weeks I have done a clean install of OS Yosemite in my MBP retina. 

But unfortunately I have noticed some bugs such as: 

- When I press Shut down the dock stays the half freezed, not completely disappeared and then the system shut down.

- Its a grey screen when I switch on from sleep

- It has completely freezed 3 times and restarts itself

- The wifi signal has been lost 2 times, in my home using my router wlan.

- The continuity doesn't work with my iPhone 6+.

- I don't know but I think that Mavericks were faster.. 

I have done PRAM and SMC reset but nothing. 

MacBook Pro (Retina, Mid 2012), OS X Yosemite (10.10)

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MacBook :: Screen Freezes Up And Tells To Restart

Jun 12, 2009

every 10 minutes something popped up and froze saying that i have to restart my mac book. iz there a virus?? what shud i do so it wont pop up for me to restart every 10 minutes again?

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OS X :: Mac Freezes And Stuck On White Screen On Restart

Jan 2, 2010

I got my IMac 3 years ago just recently started running slower in the past couple months, nothing too bad though. However just yesterday it became unbearable to use. 10 min to start up, once it was on took forever to open up any files etc. So I did some research online and I decided my best option was to reinstall the OS with my startup disk. I did that and erased all my harddrive (nothing important on it.) After doing that it ran great like brand new. Today I turn it on, it continues to work great for a few hours then it freezes in me. I held down the power button to restart. Turned back on and it was stuck on the white apple startup screen. After 15 min I decided to power it off and let it rest a while. After resting it still won't start up.

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OS X :: MacBook Pro Screen Freaked Out - Freezes On Restart

Jun 26, 2010

Yesterday I was working away at it when suddenly the screen freaked out, there was blocks of color everywhere and the mouse was acting strange (jerky, up was down, down was up etc etc) I had to hold down power to repair it. When it started loading it froze the little circle in the middle stopped spinning and I had to restart it. Then the same thing happened again froze. So I started it in safe mode then restarted again. This time everything was back to normal. But today again I was just using the computer when everything went all glitchy again and same thing, this time when I went in safe mode the screen darkened and a box in the middle said something was wrong and to restart my computer.

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MacBook Pro :: Hot CPU Freezes Its Forcing Hard Restart

Jun 20, 2012

My MacBook Pro early 2011 13" freezes, requiring a hard restart when the CPU temperature stays in the 195 F (as measured by iStat nano) range for more than a few minutes. The fans run appropriately. I am running 16 GB of RAM, most of which is not being used during these 'hot' episodes (according to Activity Monitor). Typically they happen when Mail is trying to connect to iCloud and can't seem to do it. Then the spinning beach ball. Can't force quit or restart from the Apple menu. I'm using 10.7.4 on a dual core i7, 2.7 GHz unit.

Info:MacBook Pro (13-inch Early 2011), Mac OS X (10.7.4), Speck clam shell translucent case

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MacBook :: Screen Goes Dark And Freezes And Makes Restart

Sep 8, 2010

While surfing the internet the screen goes dark and wont let me do anything but turn off. (see picture)

Anyone else had this issue? not the first time this has happened!

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MacBook Pro :: Cannot Restart - Freezes On Blank Desktop Background

May 20, 2010

I have a base 15" mbp 2010 model. I wanted to restart my laptop several times and this happened about twice now. I had to force shutdown by holding the power button, but this can't be healthy for it. Here's what happens, I go to apple>restart and then my desktop icons and taskbar, finder bar goes all away so that only my desktop background is showing, and it stays there. I can still move the cursor with my trackpad but me being new to macs, i don't know any keyboard shortcuts to bring up the activity monitor and stuff. Is something wrong with my macbook pro?

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MacBook :: Freezes At Restart - Unable To Insert Disc

Jun 30, 2010

I put in a cd that my computer was unable to read. I tried to eject it using disk utility but it failed. I read that another option was to restart the computer and hold down command, option, o, and f at the same time to open disk firmware to eject it. instead of actually working, my computer froze at the rstart screen, and i have no idea what to do - and i am unable to insert a disc.

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MacBook :: When Updating Software It Won't Restart And Screen Freezes

Apr 11, 2012

When ask to update software and click 'update all' and asked to restart laptop, the screen freezes and I had to force shutdown.

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OS X :: Macbook Pro Freezes With Msg Restart Computer By Pressing Power Button

Apr 8, 2009

I have a macbook pro, bought it May last year(2008). I don't know much about computers, but I loved the transition between pc and mac, had no trouble with it, loved to work with it, until now. I had noticed it became slower like 3 weeks ago, and a week ago, it started to freeze up on me followed by a message that said please restart your computer by pressing the power button and the screen becomes dark. When I try to restart it again, it takes a while because it shuts down again and again, until the 10th time it works. The store told me to clean intall, which I did yesterday, it seemed to have worked, it was faster for sure, but today it happened again, 3 times! Has this happened to anyone? Does somebody know what to do?

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Windows On Mac :: Freezes - Black Screen When Request Restart From XP Side Of Boocamped Machine

Apr 8, 2008

Does anyone else consistently experience a black screen and 'nothing' when they request a restart from XP side of a boocamped machine, but not the OSX side?

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IMac :: IMac Freezes When Connecting External Monitor?

Apr 8, 2008

I have a newer iMac 24" bought in 11/2007. I have the mini-dvi to vga converter and when I connect it to a external tv capable of 1024x768, the iMac freezes and does nothing. I disconnect and the screen turns blue and the flickers back on and everything works. I have made the connection then booted up, and I have tried every resolution all the way down to 640x480, same thing it just locks up the screen, but again as soon as I unplug the mini-dvi to vga cable from the iMac it flicks to a blue screen and everything comes back. I have reviewed dmesg nothing, and revieiw /var/log/messages. Is there any troubleshooting I can do. I am old school unix/linux guy just converted my family to Apple and would like to use the display on my tv to watch my iTunes movies.

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IMac PPC :: Way To Restart G5

May 11, 2012

I have had a G5 iMac for several years. It has OS10.5 installed and I had two exgrnal hard drives attached. Recently it began to slow down quite a lot and I have been trying to clean it up and get rid of files that weren't required. Yesterday when I tried to start it up the spinning circle with the Apple logo in the background was replaced by a no entry sign. In order to try and do a safe restart I have held down shift. I have held down C and I have even tried shift and C, but nothing is happening.

Info:iMac Power PC, Mac OS X (10.4.8)

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PPC :: G5 Imac Won't Restart

Jun 22, 2012

G5 imac won't restart

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Freezesvery Often Imac

Apr 10, 2012

freezesvery often imac

iMac (24-inch Early 2009), Mac OS X (10.7.3)

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IMac PPC :: G4 Won't Startup - How To Restart It

Apr 16, 2012

I have a 2003 17" flatpanel imac (1 GHz)I've been using it for the specific purpose of running some old OS9 software.It's the only way I have to get to some old files.It's been working fine.Then, after a shut down, I cannot get it to restart.Push the power button. Nothing. No sound. Nothing.I've uplugged it for 30 seconds and replugged and tried to restart.Nothing.Is there any other type of power management restart I can try?I have several other newer macs, all running 10.6 or 10.7, which I use for 90% of my work. But this one machine is my only link to these old (OS 9) files which I still need to access.

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IMac PPC :: Have To Restart Several Times To Get It To Come Up

Jun 30, 2012

I'm suspicious it's something to do with the power supply because after about 4 reboots where I hold the power button down until a horn beeps, it will start. It first only boots to white screen...reboot...comes up to white screen with Apple in middle...reboot...comes up to blue screen...reboot...boots fine and operates fine.   I do notice that it reboots every once in awhile for no apparent reason. 

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OS X :: Imac Freezes After Sleep

Nov 5, 2009

I recently had a hard drive failure in my imac which i replaced with the the samsung drive listed below and a fresh install of snow leopard. Now i am experiencing a problem when waking my mac from sleep. about 50% of the time when it wakes it will immediately freeze which can only be resolved by a reboot. Could this be caused by this new drive being a "green" drive that conserves more energy when asleep by going into a slower state than a typical drive or is this a software issue?

2 ghz
4 g ram
Hard Drive
1.5 t

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OS X :: Imac Freezes On Shut Down

Aug 6, 2010

i have an imac with 500gb hdd 3.06 ghz and 4gb ram, im running os x 10.6.4 snow leopard. every time i go to shut down the whole computer freezes i cant click anything, all i see is the wallpaper and nothing is running when i click shut down.

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IMac Freezes When Do A Shut Down

Mar 23, 2012

My iMac won't shut down completely any more.It gets to a white screen and then freezes, and I have to hold down the power button to get it to shut down.I have also been getting intermittent kernel panics, maybe one every 3 or 4 days.I went through all of the troubleshooting steps to try and figure out the cause, with no luck.Did a new install of Lion and everything seemed OK for a few days, and then started having problems with programs not responding, not being able to shut down, and now getting kernel panics again.Considering completly formatting the drive and starting fresh with everything, but not sure if that would solve the problem either.

iMac, Mac OS X (10.7.3)

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IMac :: Getting White Screen After Every Restart

Nov 11, 2010

This is perplexing me: I've only had my iMac 21.5" for a week. I posted here about the white screen issue after the 1st s/w update. Now, on every restart I get the same *but only when* my USB ext HDD is plugged in; unplug it & it starts fine, plug HDD in and it mounts, checked external HDD with disk utility - AOK. Never had this problem with my old 20" iMac! It's still in DoA period so is it best to get it swapped out?

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IMac :: Copying Files From DVD Cause Restart

Sep 23, 2009

I'm having a problem with my Mid 2007 iMac. Some files copying from a DVD (Logic Express 9 Demo Content), cause my iMac to restart. I know the files are fine as I can copy from another mac. I've had this problem twice before since I've had my mac (Oct 2007), but it was in reverse (trying to burn to a DVD). Everything else works fine copying to and from the drive. I want to ring Applecare, but I can imagine that they will say don't worry about it, since its only them files, and everything else can copy fine.

I've tried all the basic stuff:
-checking a new account
-and the smc

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IMac :: Can't Restart - Gear Still Spinning

Jul 19, 2010

I closed all programs and restarted my imac..that is 15 minutes ago...the little gear is still spinning 15 minutes later and hasn't restarted...should I just power off?

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IMac PPC :: Restart A G4 Version 10.4.11 Without Disc?

Jun 27, 2012

how do i restart a imac g4 version 10.4.11 with out disc

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