I'm another mac user and i've had that problem myself .. usually though, it's caused by one of 2 things .. either the .obj file isn't where a .cr2 expects it to be (installed into wrong directory), or it doesnt say .obj on the end. it has to end with .obj. Or, the .obj file doesnt have the same name as the reference in the .cr2. I couldnt help but notice your quoted error said "cannot open the .obj file OXANA_V2." ... notice, not OXANA_V2.OBJ, like it should be. in Windows you dont see the suffixes but on the mac you should.