Mavericks Finder window- and shadow-rendering issues-Screenshots

Hi Steve,

Thanks for visiting Apple Support Communities.

I'd suggest trying the steps in this article to troubleshoot the video issues you're experiencing:

Apple computers: Troubleshooting issues with video on internal or external displays

http://support.apple.com/kb/HT1573

Start with these steps:

Reset the system

You can reset the Mac's parameter RAM and SMC.

Reset the resolution

...

Start up in Safe Mode.

If the issue occurs in Safe Mode as well, I'd recommend reinstalling Mavericks next.

Regards,

Jeremy

Hi Steve,

I'm glad that helped.

Have a great day,

Jeremy

Hi Steve,

Thank you for using the Apple Support Community. Due to the nature of the issue, you may find more information by using another one of Apple's support resources - https://getsupport.apple.com/GetproductgroupList.action.

Best,

Jeremy

I ask a similar question under a different topic before seeing this one. I'm wondering if the problem is what I am experiencing. I will put a picture under here for a better description.

I'm having this same issue with window drop shadows rendering oddly! I'm relatively certain this is not a hardware issue (it never occured in previous version of the OS). It's happens on both my 15-inch Retina from early 2013 and my 15-inch from late 2010. Very frusterating. It's not a consistent issue, but it happens enough.

Steve H. - I would love to hear what the Apple Geniuses have to say about this.

Yet another party chiming in here. I often use a particular old application that has started behaving oddly following my updating my laptop to Mavericks. I don't see garbage patterns when waking from sleep or switching between applications, as you are seeing. But when I type into my application, the text I type does not appear until I click outside the application to cause the application to lose its focus. Then my typed text suddenly appears. Then I can click back inside the application window and type some more. It seems to me that my problem, and all of the various display problems described above, are similar -- some old applications are not getting all of the "refresh the application screen display" messages that they are expecting. Hopefully this will be a helpful clue to the Apple Geniuses. :-)

I am having the same issue with the window shadow rendering. It looks exaclty like the pictures gkendric posted above. The last time it happened it also affected all the icons on my desktop and the the icons in dashboard. I had a quick chat with apple online... I pointed them to this thread. They did not agree this was a known issue, although it seems like there are a few of us encountering the same thing. This only started after the upgrade to Mavericks. It seems pretty straightforward to me.

The suggestion I received was to erase and reinstall mavericks. I am just a little dissapointed that is the suggestion. I am planning to take it in to an apple store as soon as I can. I am eager to see if anyone else has had any luck in resolving this issue. Also interested to see if the erase/reinstall solution fixes the issue.

Count me as another victim of this problem. MacBook Pro 15" Mid 2010, 2.4 GHz Core i5, dual GPU. The problem has been fairly frequent since upgrading to 10.9 a month ago. Haven't been able to figure out what triggers it though. If anyone fiigures it out, please post back here. Meanwhile my fingers are crossed for 10.9.1 to fix it.

Same here. MacBook Pro 17" Mid 2010 with Maverick OS X 10.9 (13A603). Problem started yesterday. Not happy with it. Keeps going after a reboot for about an hour (sometimes 2) and then needs a reboot.

I went to the apple store. They ran diagnostics on my MBP. No issues in the general test. Then they ran a test that took about 15 minutes that focused on my GPU, as that is the most likely faulty component considering the shadow rendering issue. My computer passed that with flying colors as well.

Apple genius said that they could keep it for a 24 hour more intesive diagnostic test, but his suggestion was to take it home and erase/reinstall mavericks and see if that fixed the issue. I did that. Cleared whole system. Left all data and settings on my backup drive.

After a fresh install it happened again within 6 hours. Boo.

I hope for a software update that addresses this. I fear that it is an issue with the GPU in our MBP's. There are other threads that suggest that might be the case and our GPU's have trouble handling the more intensive graphics in Mavericks. Come on Apple. Please step up and address this as a known issue.