Gatekeeper Already Present in OS X 10.7.3, Available for Developer Testing

With developers needing to prepare for Apple's new Gatekeeper feature in OS X 10.8 Mountain Lion, Apple has revealed that the functionality is already baked into OS X 10.7.3 but hidden by default. Apple has instructed developers that they can enable Gatekeeper on OS X 10.7.3 from the command line in order to test the functionality.

Mac OS X users will soon have the option of turning on Gatekeeper, a new Mac OS X security feature. When a user does this, the system provides an additional measure of safety: it blocks that user from opening newly-downloaded applications that are not Developer ID–signed. In this scenario, the same user is easily able to launch downloaded applications that are Developer ID–signed.

By default, Gatekeeper is not enabled in Mac OS X v10.7.3. For testing purposes, you can turn it on by using the new Mac OS X system policy control command-line tool, spctl(8).

Running the command "sudo spctl --enable" in Terminal will enable Gatekeeper on OS X 10.7.3, and the system can be turned off by replacing "enable" with "disable". With the system enabled, developers can then test how their applications will behave on systems using Gatekeeper.

gatekeeper lion
Warning for non-signed application download with Gatekeeper activated on OS X 10.7.3

Regular users obviously would have little use for activating Gatekeeper on their Lion systems at the present time, as developers have not yet had a chance to begin distributing updated versions of their applications integrating the new Developer-ID functionality. But its inclusion in OS X 10.7.3 is an interesting tidbit that will help developers test their applications with the new program and explains why the new Xcode 4.3 that supports Developer-ID requires OS X 10.7.3.

In another sign of Apple's desire to quickly implement Gatekeeper, Panic's Cabel Sasser notes that Apple contacted select developers last week to invite them to learn more about the feature.

Popular Stories

Apple Logo Zoomed

Tim Cook Teases Plans for Apple's Upcoming 50th Anniversary

Thursday February 5, 2026 12:54 pm PST by
Apple turns 50 this year, and its CEO Tim Cook has promised to celebrate the milestone. The big day falls on April 1, 2026. "I've been unusually reflective lately about Apple because we have been working on what do we do to mark this moment," Cook told employees today, according to Bloomberg's Mark Gurman. "When you really stop and pause and think about the last 50 years, it makes your heart ...
wwdc sans text feature

Apple Rumored to Announce New Product on February 19

Thursday February 5, 2026 12:22 pm PST by
Apple plans to announce the iPhone 17e on Thursday, February 19, according to Macwelt, the German equivalent of Macworld. The report, citing industry sources, is available in English on Macworld. Apple announced the iPhone 16e on Wednesday, February 19 last year, so the iPhone 17e would be unveiled exactly one year later if this rumor is accurate. It is quite uncommon for Apple to unveil...
Finder Siri Feature

Why Apple's iOS 26.4 Siri Upgrade Will Be Bigger Than Originally Promised

Friday February 6, 2026 3:06 pm PST by
In the iOS 26.4 update that's coming this spring, Apple will introduce a new version of Siri that's going to overhaul how we interact with the personal assistant and what it's able to do. The iOS 26.4 version of Siri won't work like ChatGPT or Claude, but it will rely on large language models (LLMs) and has been updated from the ground up. Upgraded Architecture The next-generation...
iOS 26

iOS 26.3 and iOS 26.4 Will Add These New Features to Your iPhone

Tuesday February 3, 2026 7:47 am PST by
While the iOS 26.3 Release Candidate is now available ahead of a public release, the first iOS 26.4 beta is likely still at least a week away. Following beta testing, iOS 26.4 will likely be released to the general public in March or April. Below, we have recapped known or rumored iOS 26.3 and iOS 26.4 features so far. iOS 26.3 iPhone to Android Transfer Tool iOS 26.3 makes it easier...
iphone 17 pro dark blue 1

iPhone 18 Pro Max Rumored to Deliver Next-Level Battery Life

Friday February 6, 2026 5:14 am PST by
The iPhone 18 Pro Max will feature a bigger battery for continued best-in-class battery life, according to a known Weibo leaker. Citing supply chain information, the Weibo user known as "Digital Chat Station" said that the iPhone 18 Pro Max will have a battery capacity of 5,100 to 5,200 mAh. Combined with the efficiency improvements of the A20 Pro chip, made with TSMC's 2nm process, the...

Top Rated Comments

GenesisST Avatar
183 months ago
Wow! MacRumors sure bears its name today!

Me love it!
Score: 17 Votes (Like | Disagree)
basesloaded190 Avatar
183 months ago
This is ridiculous. An obvious money grabbing attempt by making users (by default) go through their App Store to get their software and system updates.

It looks really difficult to turn gatekeeper off too :rolleyes:
Score: 15 Votes (Like | Disagree)
Stella Avatar
183 months ago
Wait, how is this going to work with open-source stuff that you compile yourself?
You turn off Gate Keeper.

But, the software may not be safe. It may trash your hard disk and steal your girlfriend. :D
Score: 11 Votes (Like | Disagree)
spazzcat Avatar
183 months ago
I like the idea. Apple is preparing for the Windows style virus that are slowing starting to arise.

Virus =/= malware
Score: 8 Votes (Like | Disagree)
BillyBobBongo Avatar
183 months ago
Wow! MacRumors sure bears its name today!

Me love it!

Aye, poor Eric is working overtime today!
Score: 8 Votes (Like | Disagree)
HiRez Avatar
183 months ago
"You should move it to the Trash". Wow, that's a bit harsh. Should I also piss on it and kick it first?
Score: 7 Votes (Like | Disagree)