Has Mac OS Leopard came out?

Not yet. You can get an email from Amazon when it is available from the following web site: http://www.amazon.com/Mac-OS-Version-10-5-Leopard/dp/B000FK88JK?tag=easiamus-20
For Has Mac OS Leopard came out? try this:

• Not yet. ... ... You can get an email from Amazon when it is available from the following web site: ... ... http://www.amazon.com/Mac-OS-Version-10-5-Leopard/dp/B000FK88JK?tag=easiamus-20
  
• No not yet(as far as I know) they will be announcing the release date within the next month since the released 10.49 a couple weeks back