New OSX comes out tomorrow, priced at $19.99 thru the app store. You can only upgrade if you have a computer that can run it and a OSX 10.6.8 or higher running.
http://www.macrumors.com/2012/07/24/...orrow-july-25/
If i read Mac Pros and Macbook Pros 2011 model is running good with it i will upgrade. If i hear bad reports end of the day ill hold off till 10.8.1
Cause when 10.7 came out it screwed all my macs up so bad i have to downgrade.