Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

User profile for user: Cruciarius
Cruciarius Author
User level: Level 1
20 points

iMac 5K Freezing

I have an iMac 5K. Bought it March 19th with Apple Care. Yes, I know I could schedule an appointment, but in hopes someone may be able to solve this without a trip to the store.


The problem:

It seems to be random (I can't cause this to happen at will) that the whole system freezes/locks up. Most of the time I have the following apps open:


Discord

Adium

Skype

Twitterrific

Firefox

Safari

iTunes

Chatty

OBS

DragThing

Photos


Again, it's random when this happens. I'll be browsing the web, listening to iTunes and usually watching someone stream games on Twitch. While doing nothing special, my mouse will stop moving and everything stops, other than maybe iTunes. iTunes will continue to play the current song playing, then it stops. Even the clock stops changing. Sometimes it "fixes" itself after a few minutes. Sometimes it doesn't. I've tried repair permissions by both while logged in and in safe mode, but both seem to come back with normal results, saying everything is ok.


Due to how random the freezing seems to be, I've not really been able to eliminate certain apps being the cause of the problem.


System Specs:

iMac (Retina 5K, 27-inch, Late 2014)

OS X 10.10.5

Processor 4 GHz Intel Core i7

Memory 32 GB 1600 MHz DDR3

Graphics AMD Radeon R9 M295X 4096 MB


I've not updated to El Capitan yet, due to the nightmare stories of many apps and games being broken under it. Certain ones of which I use have reported major problems.

iMac with Retina 5K display, OS X Yosemite (10.10.5)

Posted on Nov 27, 2015 6:50 PM

Reply
Question marked as Best reply
User profile for user: Linc Davis
Linc Davis
User level: Level 10
209,547 points

Posted on Dec 4, 2015 9:08 PM

When the machine becomes unresponsive, note the exact time: hour, minute, second.

These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.

Launch the Console 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 and start typing the name.

The title of the Console window should be All Messages. If it isn't, select

SYSTEM LOG QUERIES â–¹ All Messages

from the log list on the left. If you don't see that list, select

View â–¹ Show Log List

from the menu bar at the top of the screen.

Each message in the log begins with the date and time when it was entered. Scroll back to the time you noted above.

Select the messages entered from then until the end of the episode, or until they start to repeat, whichever comes first.

Copy the messages to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.

The log contains a vast amount of information, almost all of it useless for solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.

Please don't indiscriminately dump thousands of lines from the log into this discussion.

Please don't post screenshots of log messages—post the text.

Some private information, such as your name, may appear in the log. Anonymize before posting.

When you post the log extract, you might see an error message on the web page: "You have included content in your post that is not permitted," or "The message contains invalid characters." That's a bug in the forum software. Please post the text on Pastebin, then post a link here to the page you created.

If you have an account on Pastebin, please don't select Private from the Paste Exposure menu on the page, because then no one but you will be able to see it.

View in context
6 replies
Question marked as Best reply
User profile for user: Linc Davis
Linc Davis
User level: Level 10
209,547 points

Dec 4, 2015 9:08 PM in response to Cruciarius

When the machine becomes unresponsive, note the exact time: hour, minute, second.

These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.

Launch the Console 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 and start typing the name.

The title of the Console window should be All Messages. If it isn't, select

SYSTEM LOG QUERIES â–¹ All Messages

from the log list on the left. If you don't see that list, select

View â–¹ Show Log List

from the menu bar at the top of the screen.

Each message in the log begins with the date and time when it was entered. Scroll back to the time you noted above.

Select the messages entered from then until the end of the episode, or until they start to repeat, whichever comes first.

Copy the messages to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.

The log contains a vast amount of information, almost all of it useless for solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.

Please don't indiscriminately dump thousands of lines from the log into this discussion.

Please don't post screenshots of log messages—post the text.

Some private information, such as your name, may appear in the log. Anonymize before posting.

When you post the log extract, you might see an error message on the web page: "You have included content in your post that is not permitted," or "The message contains invalid characters." That's a bug in the forum software. Please post the text on Pastebin, then post a link here to the page you created.

If you have an account on Pastebin, please don't select Private from the Paste Exposure menu on the page, because then no one but you will be able to see it.

Reply
User profile for user: Cruciarius
Cruciarius Author
User level: Level 1
20 points

Dec 4, 2015 3:39 PM in response to Linc Davis

Got home from work today and tried to use my computer. Was frozen again. The screen came on, but to the dark gray screen with the cursor unable to be moved. The login screen didn't even come up.


Skimming through the few hours of console log, I think I found something.


http://pastebin.com/bjNS2ZZQ


That's when a "GPU HangState" started appearing, followed by a bunch of other stuff. That repeated constantly for hours, until I reboot. It started at 2:47pm and kept going until I got home, which was about 6pm.


If you need more of the log than that, let me know.

Reply
User profile for user: Cruciarius
Cruciarius Author
User level: Level 1
20 points

Dec 4, 2015 9:08 PM in response to Duane

I'm using Yosemite. Same reported issues with those apps? I use both. Could do without Twitterrific on the desktop, I guess, since I have it on both my iPhone and iPad. DragThing though... I know it's lacking in updates, but it's something I use daily. Any alternatives? Back in 2014, the dev said it works fine and would work on any bugs that may happen.

Reply

iMac 5K Freezing

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple ID.
Learn more Sign up