This  OS check will fail when Apple comes out with 10.10 or 11.1, better use

```bash
# Get major OS version (uses uname -r and bash substitution)
# osvers is 10 for 10.6, 11 for 10.7, 12 for 10.8, etc.
osversionlong=$(uname -r)
osvers=${osversionlong/.*/}
```