I have two Macs...if I purchase and download it can I install it on all my Macs?
Absolutely. All Macs you own or operate.
Before you run the first installer package go to /Applications and save the installer to another disk or your other Mac, that way you won't have to DL again.
Is that legal?
Per the license, it is perfectly acceptable to do so.
And here's how to do so: http://support.apple.com/kb/HT4854
Hmm...seems odd to me that this would be legal. I would expect to have to pay per Mac.
Thanks for the info.
As long as those macs are authorized on the same iTunes account, it absolutly legal.
Retrieving data ...