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By • 6:00 am, April 25, 2013 • Another advantage of the Mac App Store, besides, safe, and of Mac OS X apps, is the safety of knowing that anything in the Mac App Store has been vetted by Apple. One way your Mac makes sure you’re (relatively safe) from rogue apps is what’s called Gatekeeper.

By default, this bit of software only allows you to install verified apps from the Mac App Store on your Mac. What if, however, you want to download software from a Mac developer who doesn’t distribute their software on the Mac App Store? You’ll need to bypass Gatekeeper in order to do so. Here’s how to do that safely. Launch your System Preferences app and head to the Security & Privacy preference pane.

You have three choices here. You can set Gatekeeper to Allow applications downloaded from the Mac App Store, the Mac App Store and identified developers, or Anywhere. The safest of these options is obviously the first one, as it will keep any software not downloaded via the Mac App Store from running on your Mac. Keep either of the top two options enabled, and when you download any app that isn’t from the Mac App Store, nor from an identified developer, your Mac won’t let you run it. If you want to bypass this security feature, find the offending app, and right click on it. That’s a two-finger click on a Macbook trackpad, a Control-click on a single button mouse, or the actual right mouse button on a multi-button mouse. Choose Open in the pop up menu, and then choose Open on the resulting dialog box, which will tell you that the app you’re trying to open is from an unidentified developer.

Once you choose to Open it this way, the app will no longer trigger a Gatekeeper warning, so be sure you know and trust the developer you got the app from.

Hello - I am unable to open the Mac App Store. When I click on the App Store App it briefly apprears in the dock (less than 1/2 second) and then disappears. I have tried: 1) Restarting 2) Closing all apps, and trying again. 3) Forcing all apps closed, then closing as many things as possible in Activty Monitor I am farily good with computers but am unable to figure this one out. I am getting to the point of reinstalling OSX but would like to keep that as a last resort. Below are the details of my machine. Any help would be appreciated.

13in MacBook Air (Late 2010) running OSX 10.9. Just to add further detail. I have noticed that when I restart my computer and then try and open the Mac App Store the logo appears in the dock for slightly longer as compared to trying to open the Mac App Store after it has already failed once. This tells me the OS is trying to open the app but some operation/setting/code is not allowing the app to open. Once it has already happend the OS already knows the app wont open and the 'appear/disappear' logo in the dock is much faster. Lastly, this is the only app I am having issues with.

I AM DETERMINED TO GET TO THE BOTTOM OF THIS, lol. Launch the Console application in any of the following ways: ☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.) ☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens. ☞ Open LaunchPad.