Hello Mac users, I just realized that the quartz, 64-bit gretl snapshot that I put up today will not run on OS X 10.7 or higher. This is to do with adding MPI support, which is quite tricky. I'll try to fix this soon (if not tomorrow than Monday) but in the meantime please avoid the snapshot if you're running Lion+. You can expect a full announcement about MPI support in gretl early next week. Allin Cottrell