So i wanted to download motion FX then it tells me WE COULD NOT COMPLETE YOUR PURCHASE Motion FX can't be installed on Macintosh HD because Mac OS X version 10.7 or later is required. does that mean i need to get lion osx?
The message is quite clear, isn't it?
"because Mac OS X version 10.7 or later is required" implies that 10.7 (aka Lion) is required. Hence you need to buy and install that up front, then try again.