Apple’s Worldwide Developers Conference to kick off June 10 at 10 a.m. PDT with Keynote address

The Keynote will be available to stream on apple.com, the Apple Developer app, the Apple TV app, and the Apple YouTube channel. On-demand playback will be available after the conclusion of the stream.

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Turbopgt Author

Level 1

7 points

iMac 5K Retina extremely slow Mission Control

Just got the base model iMac Retina 5K. Mission Control is extremely slow, and so far seems to be only part of the UI that lags. It can barely even animate. I know these are new and not yet proven, but even the worst integrated card can animate Mission Control smoothly on other Macs. I can't understand why it lags so badly. I don't want to just wait for an update while I'm in my return window, in case this is the potential of this card while driving this display, but I can't imagine that to be so.

Posted on Oct 23, 2014 2:22 PM

209 replies

luisgerh

Level 1

0 points

Dec 10, 2014 1:04 PM in response to Turbopgt

Can anyone confirm that the problem can be reproduced by starting a QuickTime screen recording and using the iMac for a minute or so? Almost always worked on mine.

Dec 16, 2014 2:23 AM in response to Turbopgt

I too have the problem. Two Apple reps have told me that Apple is unaware of the issue. I spent 30 hours following the instructions of an agent to MANUALLY restore my iMac back from factory settings which was a huge waste of time as the problem is still there. Apple don't seem very helpful in my case ... does anyone have an idea of a timeframe to fix this please?

David

tbirdvet

Level 6

13,845 points

Dec 16, 2014 4:16 AM in response to SkyeRider

Apple reps should know better as the display unit in the store does the same thing.

Dec 16, 2014 4:24 AM in response to SkyeRider

The only fix is to return the machine. I hope you are still within the 14 day period.

Dec 16, 2014 7:46 AM in response to SkyeRider

I called them too. They tried to get me to reinstall the OS but I refused, saying that made no sense because it has happened since day 1 and it happens at the ones in the store. They said they were unaware of the issue. They're going to get back to me. Hopefully they have a solution, I feel pretty silly sitting here with one of the most expensive Macs that is slower than my 4 year old MacBook.

Turbopgt Author

Level 1

7 points

Dec 17, 2014 10:10 AM in response to Turbopgt

I feel the need to reiterate here as a lot of junk is starting to fill up this thread.

1. Apple is aware of the issue. Don't let them tell you otherwise.

2. I've gone as far as anyone can go with Apple senior staff to send logs, screen recordings, everything they insist upon.

3. Had a senior engineer confirm for me that indeed they can reproduce the issue, it is a related to certain applications and combinations of applications, and can and will be fixed in a future software update.

Please stop your amateur theorizing, as there is no reason to continue perpetrating the lie that you "need the 295x to have smooth mission control". That is preposterous and flat out inaccurate.

bdoooh

Level 1

0 points

Dec 17, 2014 10:36 AM in response to Turbopgt

I completely agree. For me it was as simple as removing XtraFinder & it's been much smoother. Mission control isn't butter smooth but it's usable. Hitting space bar on an image, smoothly displays it instead of before I was experiencing some of what you guys have been experiencing of extreme slowness.

Dec 17, 2014 10:38 AM in response to Turbopgt

I got a call from them, saying the same. As long as they know it's an issue and are working on a fix I'm fine with that. Just wanted to make sure the graphics card in this model wasn't capable of driving this display, but that doesn't look like the case.

Turbopgt Author

Level 1

7 points

Dec 17, 2014 10:41 AM in response to elektrobank

That is, at best, a really poor and amateur theory to run to. These graphics cards are not even in any other machines yet. AMD just released the first driver update, which is NOT available from Apple yet.

You really should know how these things work before spouting off wild theories like maybe Apple shipped a graphics card magically capable of running complex graphics tasks.....but not mission control.

I'm not directing this at you necessarily, but anyone else who comes here to post such unsubstantiated nonsense.

Dec 18, 2014 10:07 AM in response to Turbopgt

I have the iMac 5K 4.0GHz, 32GB, AMD Radeon R9 M295X 4GB with all this problem mentioned buy you guys PLUS a very irritating lag using Excel.

Very very frustrating!

The odd thing is that the same spreadsheet runs very smooth on my Macbook Pro Retina 13"2.8GHz, 16GB, Intel Iris 1536 MB.

Shedside

Level 1

20 points

Dec 19, 2014 6:52 AM in response to Turbopgt

One thing I've tried that honestly does seem to have helped is to install ClickToFlash in Safari. It hasn't entirely eliminated the gradual slowdown of the UI's responsiveness between reboots — but it does seem to me that Flash content (maybe even just Flash video on YouTube etc) exacerbated the problem. Delighted to hear that a proper fix is coming.

kawa636r

Level 1

15 points

Dec 20, 2014 1:13 AM in response to Turbopgt

I've finished now to install 10.10.2 and the issue seems TOTALLY fixed, i'm unable to reproduce now. Now my iMac i5 with radeon 980x 2gb it's usable!

Dec 20, 2014 4:40 AM in response to kawa636r

I'm guessing you referring to 14C81f, which is beta. If yes, then no, it doesn't fix anything here.

kawa636r

Level 1

15 points

Dec 20, 2014 4:53 AM in response to celsomartinhopt

14C81h, lo siento por ti.

Eicoun

Level 1

4 points

Dec 22, 2014 3:31 AM in response to Turbopgt

I cloned my old iMac (10.10.1) via SuperDuper and Firewire to my new i5 Retina iMac. Window movement on the new iMac was extremely jerky when moving windows to the right side of the screen. The Dock was very jerky too, almost jumped on screen instead of sliding in.

After reinstalling 10.10.1 from the rescue system all the symptoms are gone and my iMac works fine. However mission control still is jerky.

iMac 5K Retina extremely slow Mission Control