HT201290: If QuickTime Player can't open an audio or video file
Learn about If QuickTime Player can't open an audio or video file
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Feb 17, 2014 12:58 PM in response to Tony T1by Miss Moist,Thanks for taking the trouble to response Tony T1.
Apple won't let me download 5square (as you suggested) or Handbrake, as it says it is from an unidentified developer. How's that then???
Michelle
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Feb 18, 2014 2:23 AM in response to Miss Moistby Alancito,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:


