Retina iMac Freezing and Restarting

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Yes, having exactly the same problems.

iMac 5 K will not complete start up. Received with 16 GB Ram, added 16 GB of third party Ram. Started up and Ram showed up in about Mac. Mouse froze up many times. Removed third party ram. Now it will not complete start up, no chimes and turns itself off after 5 minutes.

Please help!!!!!

Not all software that ran fine under previous versions of the ios are fully compatible with Mac OS X 10.10 Yosemite. It seems to me that if two iMacs exhibit the same problems that the software might be the culprit.

If you stop using and uninstall the software casusing the problem does the machine still freeze? Does the iMac freeze using any of the stock applications? I've had my iMac with .retina display for over a week and have had no freezes. But before installing any old versions of applications I checked each to make sure they were compatible with Yosemite.

geo28rge wrote:

Yes, having exactly the same problems.

Then do exactly the same thing, contact AppleCare!

Similar problem. I received my on Wednesday, 11/26/14. We use it as the media server. Apple TV will not stay connected for more than 45 minutes and then go check on the iMac and it has restarted. All the same software loaded on MacBook Pro Retina.

Just got mine today and seem to be experiencing very similar problem as well......

I got mine yesterday and I had a freeze (spinning ball) during first-time-installation, had to switch it off with the power button and started over, it hang at the iCloud login, when I clicked on "install iCloud later", or something like that.

Then I was under the impression that the 5K boots very slow, takes about twice the amount of my old (mid-2009) iMac.

Also, my 3rd party BT keyboard is not recognized anymore 😟, I have to use the keyboard that came with the 5K.

I lost connectivity to my Airport Time Capsule many times (over WiFi) and was almost ready to redo the install (re-install Yosemite) but now that I read this, I think I will make an appt. with the GB for replacement.

Latest update: I here a rattling sound coming from the screen, when I move the screen it stops rattling but after a while it starts again.

How many moving parts are in the 5K ? Maybe a small CPU fan and maybe a Graphics chip fan ?

I will bring it back to the Apple Store, this is unacceptable for such an expensive device.

I have received two iMacs Retinas, one for home and one for the office. Neither one has worked as expected. The one at the office froze like yours when starting up the first time. The one at home closes all my running programs when it goes to sleep. Very annoying. Apple has some bugs to work out. Apple is sending me a replacement for the one at home that is going to sleep and closing all my programs. I have had each of them for less than 14 days.

I have to bring it back to the Apple Store and some "Genius" will decide what to do with it.

I bought it yesterday !!!

Anyway, I expect no less than a new one, when I walk out the door there. 🙂

i have some problem ! ((( today I'm call in apple and ask what's happened 😟

what i think

- time machine

- big mail

- handoff

- specific soft

why i don't think its problem in hardware

- apple hardware test get ok status ( if you not known how start apple diagnostic test, restart you iMac and press button "d" )

- freeze and restart really randomly ! i have 8 hour session without restarts ! and i have session 5 hour and 4 restarts

- you have some problem ) and i think can't apple have serial problem in hardware

now i want test my iMac in windows system and if i see no restarts i think problem in os

i want ask you )

1) you have iOS device and handoff function ?

2) can you share you console log ?

3) you try work on windows system in bootcamp ? have restarts ?

4) have you 10.10.2 beta 1 update ? have problem ?

in apple what you say about problem ? mb this problem reflect macbook retina problem ? and apple create some path ?

topic starter, after you get you mac from apple ( second time ) that apple say ? is soft ? or hard and you not lucky ? that current status on you iMac ? you try fix problem ?

I was not happy bringing it back to the AS so I decided to go for all the tests that are possible on the iMac.

After (I think) 5 restarts and 3 or so, PRAM resets I think I finally got it to work.

I did it so many times due to the various tests I ran (all of them hardware tests as I only have Yosemite on it (10.10.1)).

Now I am unsure as to what test fixed the problem or if it was the 3 PRAM resets that finally decided to fix the problem.

I tested another time and now all tests are successful.

Right now I am waiting for a backup to finish (old TC to new TC) and after that I will install all software I need.

It is not finished yet but I think it looks a bit better now.

No reason to go to the AS now, but who knows....

im testing current on windows ( 8 hours current and, no freezes )

on mac os i have 8 hour session without freezes i think 1 day test can get result %)

I'm disable fusion Drive, install mac os on HDD and 12 hours without restarts on mac os.... i think fusion drive can get randomly freezes on iMac retina (