Graphical problem that appears in Pixelmator (GTX 560Ti)

[Cloudane]

Not sure if this belongs in graphics cards, as I'm not certain it's that (but that would be the most obvious)

 

I asked on the Pixelmator forum too, but being a Hackintosh user the response was fairly predictable  To be fair I do suspect it's related to Hackintoshing as it works normally on my legit MacBook Air.

 

My graphics card is an NVidia GTX 560Ti.  I'm running it on an i7-870 system on a Gigabyte GA-P55A-UD4 motherboard which otherwise runs OS X perfectly.

 

This is a clean install of Mavericks and Pixelmator, fully up to date, I have of course tried going into the library and trashing everything named "pixelmator" and starting afresh as well, but it's a clean install in any case.

 

For OS X installation I used (I hope it's not considered "competition" to this site) Tonymacx86's [url="http://www.insanelymac.com/forum/topic/279450-why-insanelymac-does-not-support-tonymacx86/"]#####[/url] with:

Quick Start > UserDSDT - /Volumes/Mavericks Hac/DSDT-GA-P55A-UD4-F14.aml 
Drivers > Audio > Realtek ALCxxx > With DSDT > ALC889
Drivers > Disk > 3rd Party SATA
Drivers > Disk > 3rd Party eSATA
Drivers > Disk > TRIM Enabler > 10.9.0 TRIM Patch
Drivers > Misc > FakeSMC v5.3.820
Drivers > Misc > FakeSMC v5.3.820 Plugins
Drivers > Misc > USB 3.0 - Universal by Zenith432
Drivers > Network > Realtek - Lnx2Mac's RealtekRTL81xx v0.0.90
Drivers > System > AppleRTC Patch for CMOS Reset
Bootloaders > Chimera v2.2.1
Customize > Boot Options > Basic Boot Options
Customize > Boot Options > Generate CPU States
Customize > Boot Options > Hibernate Mode - Desktop
Customize > Boot Options > Use KernelCache
Customize > Boot Options > 1080p Display Mode
Customize > System Definitions > Mac Pro > Mac Pro 5,1
Customize > Themes > Chameleon 2.2 Default
Customize > Themes > tonymacx86 Black

 

I did also have 'Customize > SSDT Options > Sandy Bridge Core i7' but realised my i7 is a Lynnfield so I removed that setting and deleted /Extra/SSDT.aml, probably unrelated but just FYI.

 

If I try to paint anything, Pixelmator just draws a checkerboard. For example the default "orangey" colour that it starts off with. I'll paint a little squiggle:

 

 

It looks ok (orange squiggle) while I'm painting it, but as soon as I let go of the mouse button it does that.

 

In what is probably a related issue, strange things happen when exporting an image. Let's hit up Google Images for.. sheep will do.

 

Looks fine when I load it:

 

 

Now see what happens when I go to the Share menu and "Export for Web"

 

 

.... oh dear!

 

How about if I export using the normal jpeg option...

 

 

As you can see, that goes wrong too, but in a different way.

 

Strange things also happen if I paint on top of an image. I painted a question mark below.

 

 

Any ideas? All other graphical and video applications are working fine, such as Aperture and Youtube.  I've seen people complain of Youtube not working on these cards, but it works fine for me.

Posted on tonymac as well, but it's a lal bit quiet over there.