I tested this card with 10.9.1 and also updated 10.9.2 versions of Mavericks, both with positive and good results. Os X was installed via myHack 3.3.1, with Chameleon 2.2 SVN 2266 boot loader included in this myHack version. Continue reading Ati Radeon Sapphire HD 6670 1GB GDDR5 on OSX 10.9 Mavericks