No it is not safe.
Snow Leopard is known to have a number of problems.
First, it causes memory problems. Its users tend to forget how to do the most basic PC tasks after a period of time.
Second, the random number generator tends to have an uneven distribution centered around arts colleges and coffee houses
Third, it runs hot because it gives users an irresistible urge to wear scarves during the spring and summer
Fourth, it tends to overwrite parts of your wallet with zeroes
Okay you can probably tell that I don't like OSX by now. In all seriousness installing OSX on non-apple hardware is hard. If you have an apple computer you can install it without issue and also install Windows 7.