Gatekeeper is a new security feature starting in Mac OS 10.8. See Apple's Website for more information about Gatekeeper features and benefits.
You can find Gatekeeper settings in System Preferences > Security & Privacy > General.
From the command line, you use the cd (or change directory) command instead. So let’s say you’re in your Home folder and want to peek inside the Downloads folder. To allow apps to be downloaded on a Mac, click on the Apple menu → Click on 'System Preferences' → Click on 'Security & Privacy' → Click on 'General' → Click on the Padlock icon → Enter admin credentials → Click on the radio button next to 'App store and identified developers.' Allowing downloads from sites you visit regularly can save you a few seconds from having to click to give your permission. This is helpful for websites that you trust. 1) Open Safari on your Mac and click Safari Preferences from the menu bar. 2) Select the Websites tab from the top. 3) On the left, choose Downloads. In the Safari app on your Mac, click the Show Downloads button near the top-right corner of the Safari window. The button isn’t shown if the downloads list is empty. Do any of the following: Pause a download: Click the Stop button to the right of the filename in the downloads.
By default, Gatekeeper will only open apps purchased and downloaded from the Mac App Store or from a list of “identified developers” that have been given the ok from Apple by obtaining a unique Developer ID. To install other apps, select the option to install from Anywhere.
It is important to only change Apple Gatekeeper settings to Anywhere when it is necessary to download legitimate programs. Permanently allowing applications to be downloaded from Anywhere can expose your computer to security risks from non-legitimate sources.
Mac Command Allow Software Download 64-bit
Always change Apple Gatekeeper settings back to Mac App Store or Mac App Store and identified developers when you are done downloading the apps you need.
Mac Software Free
Note: In most cases, Gatekeeper may only need to be disabled temporarily in order to install and initially launch an application. After that, Gatekeeper can be re-enabled to only allow applications from the Mac App Store and identified developers.