Anyone getting graphics corruption in OSX Mavericks?

27" iMac Late 2009, Quad Core, i7, 2.8GHz, 16GB RAM, ATI Radeon HD 4850

Aw man, @techcafe, thought it just affected us on the 2010 Macbook Pro.

oh i'm pretty sure Apple knows by now that there are serious bugs with Mavericks on many machines, but they're keeping quiet about it, as they always do. i'd prefer that Apple just be honest with everyone here in this forum and issue a public statement, a mea culpa; "sorry folks, we messed this one up, but we're working on it" along with reassurance that the technical problems will be fixed asap. an apology wouldn't hurt either. see, a little honesty & decency can go a long way, people respect that; and the rest of us don't have to waste our time & effort reinstalling this finicky OS and replacing logic boards, et al. unfortunately, forthrightness doesn't seem to be an Apple company policy.

I have been following this and other threads related to the problem almost since installing Mavericks. Yes, if you disable Automatic Graphics Switching the problem goes away. But then, you lose a very useful asset for saving battery power and your machine gets ever hotter.

I agree and have also commented that Apple must be aware of the conversations about the problem. It is unbelievably arrogant of the company to ignore the swell of frustration building up around the world. My loyalty to Apple as a caring company is being sorely tested. In England we have a name for salesmen who dazzle you with their wares and then dump you when you discover you've been had. Yes, I feel that bad!!!

It is unbelievably arrogant of the company to ignore the swell of frustration building up around the world.

ummhmm, corporate arrogance and greed, there's a lot of that going around these days, and not just Apple

fwiw, i've reverted back to Mountain Lion, so that's my recommendation. or Snow Leopard, even better.

Update on my original post: I actually started to notice massive speed drops when switching between apps, which I do frequently. Long spinning beach ball of death stretches encouraged me to change methods. Instead of disabling the graphics compression, this morning I turned off graphics switching. So far my blood pressure is lower and I have not noticed any unusual heating. The fan has yet to come on, and I have five apps open at the moment.

Until Apple steps up and fixes the problem in Mavericks, this to me is a more acceptable workaround that does not impair my productivity. Battery life is not a big issue for me as I usually have power available if I need a recharge.

Have you found a resolution to this? It just started happening to my Mac Mini as well! Its so annoying...

Yes, the good ol' deep reset procedure: switch off PC, disconnect power cable, wait 5 minutes, reconnect power cable, switch on PC.

After this, it never happened again.

I also had another problem happening in parallel: the screen was blinking randomly when I used the mini with screen sharing from my Macbook Pro.

I found out that the problem was with the HDMI connection to my Home Theatre receiver and from there to the TV.

Apparently this is a known issue of the mac mini, so I simply disconnected the HDMI cable and now all runs smooth, but I can't use the TV as screen for the mini.

Try and let us know if the reset works for you as well.

I experience the flashing as well... I think it just finding the best resolution... Although my main monitor is my 60" connected through my receiver via HDMI.

Im going to have to try that power trick ASAP too. Thank you for the fast response!

For the flashing try disconnecting the HDMI and use the mini with screen sharing from another PC, and see if it works.

Ill try that tonight with the screen sharing, Had my wife do the power tip and its gone!! I remote accessed it from work and good to go!!

Mavericks 10.9.2 was just released. Though there is no specific mention of the issue in the release notes, has anyone checked to see if it continues to occur?

Good news. Happy it helped.

Let us know about the hdmi.

Thanks for the info, I'll give to a try!

6 hours without any glitches on 10.9.2!

Like you, I've had 10.9.2 installed for a few hours, and so far everything is working great with automatic graphics switching turned back on. Keeping fingers crossed that Apple's engineer elves dug in there and fixed the problem.