For security reason, Mac OS X prevents you from launching apps from unidentified sources or developers. You will end up with a message saying “cannot be opened because it is from an unidentified developer”. But what if you really need to open the application?
Known as GateKeeper, this feature helps ensure the security of your system. But it doesn’t mean you cannot run unverified applications—there are always hacks to stealthily install the applications and break the boundaries.
App Cannot Be Opened Because It Is from An Unidentified Developer
While it seems impossible to launch apps from unidentified developers, there are a number of tricks to outsmart your Mac OS. Even if your computer skills are next to zero, you won’t find major difficulties when following these step-by-step instructions. Take a closer look here.
1. Disable GateKeeper
Disable GateKeeper completely can be one of the best solutions to launch apps from unidentified developers. Using this method, users need to decide if a specific app is trustworthy. It is not recommended for newbies who can’t decide which apps to trust.
Here are steps advanced users can try out to disable GateKeeper completely:
- On your Apple menu, go to System Preferences.
- Select Security & Privacy.
- Go to General tab then click the lock icon to unlock the settings.
- Under “Allow applications downloaded from:”, select Anywhere.
- Click OK or Accept on the security warning.
- Now you can launch applications from unidentified developer.
This method is available for Mountain Lion 10.8.x version and higher. The steps are the same in all versions so you can easily follow step-by-step instructions above.
2. Use Finder on Mac
If you find “app cannot be opened because it is from an unidentified developer” issue then you can use Finder to get the task done. It helps override security settings, allowing you to open the applications without hassle. Just make sure the app comes from trusted developers.
Fixing the issue can be done with the following steps:
- Launch Finder on Mac.
- Locate the application you want to launch in the Finder.
- Control + click the icon of the app and then click Open.
- Hit Open again.
The application is saved as an exception to the security settings. The next time you want to launch the app, all you have to do is to double-click the icon just like registered applications.
3. Look for an Alternative of the App
This method might not help you launch a desired app but it is worth trying. If nothing works, you may want to find an alternative version of the app. Go to the Mac App Store and see if you can find applications with similar function.
4. Find Newer Version of the App
In some cases, the app cannot be opened because it is outdated. Try to find a newer version of the app and see if it works. Open the Mac App Store and check if a newer version is available. The latest update may have a verified version so that you can overcome this problem.
5. Download App through Safari
Last but not least, you can address the problem by downloading the application through Safari browser. There might be issues when you downloaded the app through Edge or Chrome, so this method is expected to give you little help.
Before downloading a new app using Safari, be sure to delete the old one. Now that you have a new app, try to launch it and see if this method fixes the problem.
It is really frustrating when you need to open an app but it cannot be opened because it is from an unidentified developer. Luckily, there are a number of ways to try out, from disabling GateKeeper to finding a newer version.