Another Mac user here; one of the problems with DAZ downloads, even if they're labelled for Poser and manually downloaded, is that the folder structure of the zip file places the 'runtime' folder inside a 'content' folder, which is a DS setup and Poser may not recognise it when using the 'install from zip file' option. The easiest workaround is to go into the downloaded and decompressed 'content' folder, compress the 'runtime' folder inside, then install this new zip within Poser. To go back to the original post: Carrara content can't be imported into Poser AFAIK. You need a copy of Carrara and then you can (theoretically at least) import your Poser content into it.