The problem when your computer/device as a whole OR an individual application becomes unresponsive, "hanging" as it were, in mid air.

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17
votes
10answers
14k views

Why is Preview excessively slow after upgrading to Lion?

After upgrading to OS X Lion, I noticed that my preview app is now excessively slow, taking minutes to open a file instead of seconds, even when opening a local file. In addition, it is often ...
11
votes
3answers
25k views

How to stop MacBook Pro (Retina) from freezing/locking at the login/authentication dialogue, after wake?

Steps to reproduce: Be doing anything Close the lid of the computer Wait around for a while Open the lid of the computer Login prompt for last logged in user appears, battery and time MAY update, ...
10
votes
2answers
14k views

MacBook Pro with Mountain Lion freezes frequently (full screen Flash in Chrome, Messages, HTC on USB)

Problems following an upgrade to Mountain Lion on a 13-inch, Early 2011 MacBook Pro (MacBookPro8,1 with Intel HD Graphics 3000). With Google Chrome, I was watching YouTube video fullscreen – Flash ...
10
votes
3answers
31k views

Mail.app extremely slow on OS X 10.9 Mavericks

Since I updated to Mavericks two days ago on my late 2008 13-inch MacBook (first unibody aluminium), I have huge difficulties using Mail. When Mail is running, everything slows down extremely (I ...
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 ...
9
votes
2answers
7k views

MacBook Pro freezes with beachball on login (OS 10.7 Lion)

EDIT 8/21/11: It appeared that this issue may have been fixed in Update 10.7.1, but it reoccured just recently. Recently after upgrading to Lion, my MBP refuses to allow me to login. I can see the ...
9
votes
1answer
2k views

What does it mean when a %CPU exceeds (# of cores) x 100%?

Several responses to a question I asked earlier suggested I try Opera kiosk mode, so I decided to download it and give it a try. Once the download had completed and the disk image was being verified, ...
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 ...
8
votes
2answers
18k views

Mac OS X Mavericks freezes, stops responding when running out of memory

It happens every other day and the symptoms are weird to say the least. The computer still responds in some sense; I can move the mouse, the volume buttons on my headphones work. They keyboard does ...
7
votes
2answers
6k views

How does 'stuck' (in results of 'top') relate to 'not responding' (in Activity Monitor), 'spin' or 'hang'?

In results of top commands, I sometimes see stuck. Apple's top(1) OS X Manual Page does not explain this use of the word. How, if it all, does stuck relate to the following? not responding – ...
7
votes
2answers
859 views

Any way to use ssh to recover a Mac from spinning beach ball of death

On Linux, I can get to a ssh or Ctrl-Alt-F1 console and type in a command to restart the window manager. Is there any equivalent for Mac Mountain Lion? I tried ssh'ing to a frozen Mac, and I could ...
7
votes
3answers
2k views

How do I make Spotlight stop indexing my Backup drive?

I have a 2TB external drive I use for Time Machine. At random intervals, it will decide to spin up and my entire UI freezes until it's finished. This is incredibly annoying. It appears that this is ...
7
votes
1answer
2k views

Why does my computer auto-restart after freezing (Lion 10.7.3), even when disabled?

Since recently upgrading to "Lion 10.7.3" I have had repeated instances of the machine hanging/crashing without warning and then silently restarting. Problem is, that such automatic restarts happen ...
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 ...
6
votes
2answers
153 views

My iPod Touch / iPhone is frozen!

My iDevice is frozen on one screen and won't let me do anything. What can I do to fix it?
6
votes
2answers
301 views

MBP with Mountain Lion 10.8.3 loses connection to system SSD at random times and freezes

So, out of nowhere my 2009 MacBook (2,66 GHz Core 2 Duo, 8 GByte aftermarket ram) started freezing after 200+ days of uptime (sleep time included of course). I had installed a Crucial CT256M4SSD2 ...
6
votes
4answers
426 views

iMac shows frozen at bootup, but computer running normally in background

I'm on an Intel iMac running Lion. I'm having major issues with my iMac. The iMac froze whilst using Chrome, and I was forced to reset it. After the reset the screen seemed to freeze on the apple ...
5
votes
1answer
2k views

How to kill stuck Screen sharing authentication dialogue?

Sometimes when connecting to a screen sharing machine in Finder, the authentication dialogue hangs indefinitely. The only way I've been able to get rid of it is log out. So far I've tried killing a ...
5
votes
5answers
2k views

How do I know which process is causing my computer to hang?

My computer is a 15" Macbook Pro with Retina display, and I'm on OS X version 10.8.2. I have had this my computer for several months. In the past few days, the computer has been completely ...
5
votes
1answer
2k views

Momentary freeze in Mac OS X on USB device atachment

This seems to have only started recently, but every time I attach a USB device or removable media (SD Card) to my Mac Book Pro running OS X 10.8.3 there is a freeze in the mouse cursor for a few ...
5
votes
1answer
749 views

Restart automatically if the computer freezes

There is a new option in the power management system preference to "restart automatically if the computer freezes". How does this work exactly? How can the computer check that it is frozen if it ...
5
votes
3answers
10k views

How to diagnose repeated OS X hang / spinning beach ball of death?

Here are my stats and brief summary of the problem: macbook pro; mid 2009; 13 inch; 2.26 GHz; 4GB RAM (currently, will elaborate); 10.7.5 The issue I'm having is that the computer constantly gets ...
5
votes
8answers
10k views

Checking for bad blocks without formatting

My Mac tends to pause every now then when preforming simple tasks such as right clicking, opening menus and typing (It actually just froze when I started typing this question.). I've read in a few ...
5
votes
3answers
861 views

Why does Safari always hang?

I use Safari as my browser, but I've found that it frequently hangs for 20, 30 seconds (sometimes longer), often times when I wake it up from sleep and/or when I open a new tab. Though I'm not sure ...
5
votes
1answer
804 views

Mavericks Finder hangs on tagging

I'm having a problem with the new tagging feature in Mavericks and I have a feeling it might go deeper than just the tagging. The problem is this: When tagging anything on Mavericks the Finder ...
5
votes
1answer
256 views

login screen hangs when I try to switch users without disconnecting VNC client

I'm fast-user switched to the login screen. However, when I start to type my user name and password the keyboard input freezes before I am finished and I get the spinning beach ball and can't log in. ...
5
votes
1answer
1k views

Login screen freezes after the Lion 10.7.1 update

After updating to 10.7.1 (the first Lion update) & restarting the system, it's not logging me in. As I give my password and press return it stays on the same login screen. I could move the mouse ...
4
votes
4answers
7k views

Finder slow/freeze under Mavericks

<rant>I wish I never upgraded to OS X 10.9, it is so buggy!! But the alternative to stick with the unpatched earlier version of OS X was not a solution! Anyway, so I am on this crappy Mavericks ...
4
votes
3answers
3k views

With Firefox Aurora, Mountain Lion hung - but the mouse still worked

I've just had my first Mountain Lion lockup. The screen was entirely frozen in place (I have seconds displayed on my clock in iStat Menu and even that wasn't moving) BUT the mouse still worked. I ...
4
votes
4answers
1k views

What can I do about frequent beach ball Safari and other apps?

I very frequently get the beachball and occasionally the wristwatch (as in every minute or so if I'm using the machine multi app) as I use my Mac. This appears in all apps, especially Apple core apps. ...
4
votes
10answers
939 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. ...
4
votes
1answer
5k views

Why does Xcode always have trouble submitting archives to iTunes? [closed]

Some Background Xcode not submitting to iTunes flawlessly has ALWAYS plagued me! I just don't understand what's going on, ever! I know what I am doing, I have quite a few apps in the iTunes App ...
4
votes
1answer
2k views

Time Machine Backup freezing computer

Time Machine on my computer is trying to backup onto a external hard drive, but the only thing I get is the famous beach ball of death which makes my computer extremely slow. When I go to cosole.app ...
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 ...
4
votes
3answers
850 views

loginwindow process out of control

I have an early 2010 27" iMac that is the family computer. It has 5 user accounts on it. (Not sure if this is relevant or not). Often times I'll come home and the login screen won't appear. Usually ...
4
votes
0answers
1k views

Macbook Pro hangs when booting into Boot Camp Windows 7

I have a 2011 Macbook Pro 15" 10.7.4 with Windows 7 installed in Boot Camp. A few days ago, I tried to boot into Windows 7 and it just froze after I selected the Boot Camp volume on the Select Drive ...
3
votes
2answers
8k views

What might cause mouse and keyboard freezes after updating to OSX 10.8.2?

After the 10.8.2 update, keyboard and mouse input is hanging intermittently on my 2011 MacBook Air. It occurs in several applications (have tested with Safari and App Store). The keyboard input and ...
3
votes
1answer
459 views

How can I recover from a frozen fullscreen application / game?

A few times now, Starcraft 2 has frozen up on my wife's Macbook Pro, but the mouse pointer still moves and the sound keeps playing. I can also SSH in from a different machine. The keyboard shortcut ...
3
votes
3answers
2k views

Why does my computer freeze when I unplug my headphones?

Whenever I plug in or unplug my headphones into my computer, it freezes for about 10 seconds before it is able to do anything which is rather annoying. This didn't use to happen though, would anyone ...
3
votes
2answers
6k views

Can't get past the login screen even with a correct password

I recently upgraded a 2010 MacBook Pro to Mountain Lion, and it's worked fine for the most part. Today, however, upon waking up from sleep, the laptop won't go past the login screen. I enter the ...
3
votes
2answers
225 views

Occasional system hangups after upgrade to Lion: is it a disk or software problem?

I have an 13 inch MacBook unibody Alu (early 2009, before they started to be called MacBook Pro) that I use every day for many hours (it's my work and life computer). Few weeks ago within few days I ...
3
votes
2answers
772 views

OSX able to throttle down CPU on heavy usage?

I have a company macbook with a 4 core 2,8Ghz i7 (to much power for a "laptop" if you ask me, whatever). Sadly the cooler seems not to be able to handle 100% cpu usage. Sometimes filevault stresses ...
3
votes
1answer
958 views

Operating System becomes unstable after prolonged use

My setup uname -a prints: Darwin Jutsu.local 11.2.0 Darwin Kernel Version 11.2.0: Tue Aug 9 20:54:00 PDT 2011; root:xnu-1699.24.8~1/RELEASE_X86_64 x86_64 Mac OS X Version: 10.7.3 as of this post ...
3
votes
1answer
998 views

SecurityAgent causing a freeze

Intermittently, I witness a freeze with my MacPro and I was wondering if anyone has had a similar freeze and found a cure. Some background: I have my screen saver turned off. I have Energy Star set to ...
3
votes
2answers
1k views

MacOS & finder hang to beach ball after a couple of hard resets, won't go away

I had to do a couple of hard resets (holding power button until it shuts off) because MacOS became unresponsive. Now it's happenning every time, when opening a pdf with preview, or apps that used to ...
3
votes
2answers
7k views

Mac doesn't respond after sleep mode: how to Prevent this?

My mac often doesn't respond after sleep mode. What can be the reason? There are a lot of articles about what to do in this situation. But I can find nothing about how to Prevent it. Mac is macbook ...
3
votes
2answers
374 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 ...
3
votes
3answers
3k views

Built-In Trackpad and Keyboard Unresponsive after Sleep or Restart

I have a MacBook Pro (15-inch, Early 2008) that's currently running 10.7.3. I've been finding that it will intermittently freeze and then I have to shut down and restart the computer, but sometimes ...
2
votes
5answers
5k views

Is my MacBook Pro hard drive dying?

I have an early 2011 13" MBP, i7, 8GB crucial RAM, 500 GB Seagate ST9500325ASG. I've had it for about 4 months. Twice, including last night, the beach ball appears, concurrent with a sound that can ...
2
votes
1answer
383 views

Mac Freezes when left IDLE

I'm having a trouble with my Mac. It freezes totally when left idle for an hour or so and I can't get it to work by moving my mouse, pressing keys on the keyboard, etc., and I have to force restart ...