Gatekeeper

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How to Check XProtect Version in Mac OS

May 1, 2017 - 15 Comments
Check XProtect Version on Mac

GateKeeper, MRT (Malware Removal Tool), and XProtect are all built-in features of Mac OS designed to prevent malware threats and other nefarious software from being installed or used on a Mac. These security features exist in the background and are updated with regular system software updates to Mac OS, but Apple will also push quiet … Read More

How to Allow Apps from Anywhere in macOS Sierra Gatekeeper

Sep 27, 2016 - 51 Comments
Allow apps from anywhere in Gatekeeper for macOS

Gatekeeper in macOS Sierra is now stricter than ever, defaulting to only allow options for apps downloaded from either the App Store or the App Store and identified developers. Advanced Mac users may wish to allow a third option, which is the ability to open and allow apps downloaded from anywhere in macOS Sierra.

Fixing an Installer .pkg Stuck on “Verifying” in Mac OS X

Jul 26, 2016 - 43 Comments

Mac users may find that a system update, installer, or package (pkg) can get completely stuck in a verification sequence, with a pop-up alert that says “Verifying ‘name.pkg’…” while showing the Gatekeeper icon and a progress bar that never updates. The effect is the package or installer won’t run as it never completes verification, making … Read More

How to Show & Verify Code Signatures for Apps in Mac OS X

Mar 14, 2016 - 4 Comments
Check and verify code signing of apps in Mac OS X

Code signed applications allow security conscious users to verify the creator and hash of a particular app to help confirm it has not been corrupted or tampered with. This is rarely necessary for average Mac users, particularly those who obtain their software from the Mac App Store or other trusted sources since the apps are … Read More

How to Prevent Gatekeeper Turning Back On Automatically in Mac OS X

Nov 5, 2015 - 11 Comments
Terminal in macOS

Gatekeeper is a security feature built into Mac OS X which helps to prevent unauthorized applications and code from executing on a Mac. Most users have encountered Gatekeeper before when they go to open an application downloaded from the internet, where you see an “App can’t be opened because it is from an unidentified developer” … Read More

How to Add Gatekeeper Exceptions from Command Line in Mac OS X

Jul 15, 2015 - 7 Comments
Terminal in macOS

Typically if you want to have an application launch approved by the GateKeeper feature on a Mac, you right-click on the unidentified developers application and choose “Open”, or go through System Preferences to bypass Gatekeeper that way. Another option is to manually add application approvals and exceptions to Gatekeeper by turning to the command line … Read More

How to Disable Gatekeeper from Command Line in Mac OS X

May 4, 2015 - 9 Comments
Gatekeeper warning in Mac OS X prevents unknown apps being launched

Though most Mac users will want to keep Gatekeeper enabled for security purposes, some advanced users find that Gatekeeper is overly zealous in preventing third party apps from being used in OS X. While it’s easy to turn off Gatekeeper through the System Preferences on a Mac, another option is to disable Gatekeeper by using … Read More

Bypass Gatekeeper in Mac OS X with Security Preferences

Nov 8, 2013 - 10 Comments

Gatekeeper is an application level security feature on the Mac that aims to prevent unauthorized and unidentified apps from being launched in Mac OS X, thereby preventing potential security problems like exploits or trojans from running on a Mac. The feature is most often encountered when an app has been downloaded from the web, and … Read More

Fix the “App can’t be opened because it is from an unidentified developer” Error in Mac OS X

Jul 27, 2012 - 66 Comments
App Can't be Opened from Unidentified Developer warning

Mac OS X defaults to preventing applications from unidentified developers or sources from being launched. You’ll discover the message in OS X when you try to launch a Mac app that didn’t come from a verified source or from the Mac App Store, and you’ll get an alert dialog that says “[App name] can’t be … Read More

How to Check if your Mac Malware Definitions List is Updated

Jun 2, 2011 - 8 Comments
Check if your Macs Malware Definition List is Updated

The malware protecting Mac OS X Security Update will automatically download and update it’s malware definitions list from Apple, but if you’re like me you probably want to know how to manually check if the malware list is updated or not. We’ll show you where the malware list is located and how to determine when … Read More

Disable Automatic Downloading of Malware Definitions List in Mac OS X

Jun 1, 2011 - 3 Comments

A recent anti-malware Mac OS X security update was released that defaults to automatically downloading and maintaining an active definitions list of known Mac OS X malware threats. This list comes from Apple and is likely a very small file that is transmitted to your Mac, imposing minimal bandwidth usage. For 99.99% of users, you … Read More

Disable “application downloaded from the internet” Message on a Per-App Basis in Mac OS X

Sep 12, 2010 - 15 Comments

OS X warns users in a variety of different ways if they have downloaded a file from the internet to their Mac, with a popup message that says something along the lines of “[NAME] is an application downloaded from the internet. Are you sure you want to open it?”, or even “this application can’t be … Read More

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