Carrara 8.5.1.19 appears to be working nicely on mac 10.10.3. Now if they could just go get Bryce into working! I miss my Poser/Bryce/Carrara workflow. I have not spent much time trying to work with Gen 2 in the Carrara update much as yet, but it is loading them up rather nicely so far; however,  I do keep finding breaks in the texture seams most often right at the thighs.

That may be due to Carrara defaulting to Fast Mipmap for the image maps. Try changing them to Sampling to see if that solves it.