Dual screen graphics issue with Yosemite?

I'm having the same issue, but with a mid 2012 non-retina MBP (2.5ghz, 16gb RAM). The oddity is that the lag is not experienced on the main laptop display. This is new since upgrading from Mavericks to Yosemite.

1080p display through Thunderbolt > HDMI

Non-Mirrored

I installed OS X Yosemite on my mid-2010 15" MacBook Pro running a 2.55 GHz Intel Core i7 processor. I run this computer hooked up to an external 30 inch monitor and use both the external monitor and the MacBook Pro built in monitor simultaneously (non-mirrored). I'm a big user of the OS X accessibility zoom feature. After upgrading to Yosemite the performance when I zoom is awful. There is a delayed reaction when zooming, in other words you don't see the result until many seconds after zooming (holding down command key and scrolling with mouse button). When zoomed in using the mouse results in delayed and very jumpy mouse cursor on the screen. Also, when zooming on the main external 30 main screen, the MacBook Pro built in screen goes all wonky (pixelated images, unrecognizable images). Even when I close the lid on the MBPro and only use the external monitor, I still get performance issues when trying to use screen zoom. Any ideas?

I'm have exactly the same issues. I hope Apple fix this.

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MacBook Pro (Retina, 15", Early 2013)

2,7GHz Intel Core i7

Memory 16GB

NVIDIA GeForce GT 650M 1024GB

Apple Cinema Display 27" (not thunderbolt)

I have the same problem, OSX 10.10 - clean install. Macbook 7.1, 2.4GHz Dual Core - 8GB RAM

I am experiencing similar problems as well on my 13" MBP (late 2011). Had me thinking I'd have to go and buy more RAM then pay someone to have it installed, then I read some chart on the Apple support page that says additional RAM is not available for this type of machine (had the same input for all sizes and models of MBP). This had me super infuriated after paying as much as I did for the MBP, 2 Apple TV's, iPod touch, iPhone, 4, iPhone5, (iPhone6 soon I'm sure), all the apps, all the accessories (magic mouse, magic track pad, magic keyboard, magic thunder bolt adapter, iPhone4- iPhone5 charger adapter, the car charger, don't even get me started on all the music I've purchased. At this expense this machine better last more than 3 years!!!!! This coming right after having to replace the Magsafe macbook charger, and upgrade to the wireless keyboard (that one was my fault), nonetheless, maintenance on this machine is becoming more costly than I ever imagined sometimes. But anyway, yes, I do hope this problem is recognized and resolved by Apple very soon because I DO LOVE all this crap I've had to buy and understand that normally it is of superior quality to the alternative (Windows, Microsoft, dumpster diving, etc.) <--sorry, that was ugly-- Have had eye surgery (at age 37), and my vision isn't what it used to be, so I almost always Mirror my built-in screen to my 55" Smart TV (living room), or the 36" Dumb TV (bedroom), just to be able to see it comfortably without use of "granny goggles." Point being, in my opinion, this is kind of a huge problem!! Its even effecting Tigerman87's productivity, and we all know there's nothing more frustrating than that!!

Thanks, just wanted to pitch in my addition there!

Not quite on-topic but I have a recent Dell monitor plugged into the HDMI on my MBP Retina Late 2013, and when I start up the machine the OS recognises the monitor, shows the desktop but won't allow the cursor on to the Dell monitor screen. This is insanely frustrating, yes by unplugging and replugging the HDMI cable it works, but now I have to do that every day? And they call that an improvement? Apple please sort this out and stop releasing half cooked OS's, everything worked fine on Mavericks.

I am experiencing the same problem with my second display. As a writer and editor for our website and magazine, I use graphic applications all the time and they have slowed down considerably. A recent upgrade to 16GB of RAM significantly improved Mavericks but now Yosemite has made the graphics process very sluggish, - a bit like removing half of my available RAM. I am using a couple of apps - Memory Clean to clean up the memory from time to time, and MemoryKeeper which shows the available RAM in the status bar - this has decreased by half since Yosemite was installed, maybe the OS X developers for MBP's can take this into account for the next interim upgrade to improve performance. I guess one would have assumed that because the display under Yosemite is so flat and bland that speed would have improved, but no it has decreased significantly. I am now thinking about a return to Mavericks - thats how disappointed I am.

Hi Tigerman87 - that's interesting, how did you get hold of 10.10.1

There definitely seems to be a problem with a second display via HDMI on the MBPR. After switching to Yosemite I experienced terrible performance issues and it took me a lot of time to figure out, that HDMI does not work any more. System was occupying up to 90% of the processor capacity. After I had switched off the second monitor, Mac is running again as it is supposed to run.

There seems no solution to this problem for the moment. Apple, take care of this issue.

Same here, a lot of graphics issues or even the hdmi is not connecting fine... And of course I already tried a few HDMI cables

Let's face it: Apple definitely has an issue here that needs urgently be solved. HDMI is not working on a MBPR.

Check my answer here to fix multi monitor kernal_task problems: http://apple.stackexchange.com/questions/164923/rmbp-kernel-task-spikes-when-con necting-more-than-one-external-monitor

Hi,

Is it working so far ?

Thanks.