I tried to use Plink on Mac. I was able to successfully download and unzip the profile from "http://pngu.mgh.harvard.edu/~purcell/plink/". However, I couldn't open the file Plink in the unzipped folder. I always get the system report of "damaged file" and "I should move it to the trash". I'm wondering if anyone had encounter similar situation before and found his/her way out.