Miss Moist wrote:
...it says it is from an unidentified developer. How's that then???
Michelle ~ That's Apple's app security system called Gatekeeper — you can read about it here:
Gatekeeper was introduced in Mac OS X (10.7.5) but your products list indicates you're using Mac OS X (10.6.4). So... Click on the menu at top left of your screen and choose About This Mac. Then under OS X, note the version in the form 10.n.n and then see this ASC tutorial: