Okami - Black lines on screen MAC

[Daibouzu]

Thanks I'll try the r7633 build with Okami.
However, I'm concerned about my saves.
Will I lose them?
If its anything like PCSX2, if I install a new version I'll lose all saves.
And I already have saves for my current 3.0-418 worth keeping.
Any help on how not to lose saves?
Thanks again!