If you’re trying to open apps downloaded from the web or elsewhere on modern versions of macOS like Big Sur, you might see an error message that says something like ” AppName.app ‘cannot be opened because it was not downloaded from the App Store.’
Below that warning is “Your security settings only allow you to install apps from the App Store.” and the error message dialog box also shows when and where the file was downloaded, with two options, selecting OK or to display in the Finder. But what if you want to open an app? That’s what we cover and you’ll see that it’s pretty simple.
How to fix “Error Messages” Mac app can’t be opened because it’s not downloaded from the App Store “
To fix the problem, “App.app cannot be opened because it was not downloaded from the App Store.” Error message on Mac, you must go to System Preferences and adjust security settings for Mac.
- Drag the Apple menu and select “System Settings”
- Select “Security and Privacy”
- Go to the “General” tab
- Click the lock icon in the corner and authenticate with your Mac account administrator account and password
- Look for “Allow app downloads from:” and select “App Store and Identified Developers”
- Alternatively, you can select the one-time “Open anyway” option for any of the applications listed, if you’ve just seen the error message
- Close System Settings
Now go back to the app and run it again, it will open well.
When you start some applications for the first time, you may still see a warning message stating “The app is not from the App Store. Are you sure you want to open it? ” in that case by selecting “Open” the application will be able to run and run on the Mac as expected. This dialog alert box also shows you where the app came from and when it was downloaded.
If you don’t want any alerts to open apps, you can choose to allow apps from anywhere on your Mac, but this is not recommended for anyone except perhaps the most advanced users in limited environments and circumstances. Gatekeeper is a good security mechanism that can prevent malicious applications from opening on a Mac, so the vast majority of users shouldn’t disable it.
Security alerts can also be bypassed once by right-clicking and selecting “Open” on the application name.
The “Application cannot be opened because it was not downloaded from the App Store” error message is basically a modern variation of an older error encountered when applications from unknown developers on previous versions of Mac OS X, which first started, could not be opened appear a long time ago with apps not made by registered Apple developers.
A similar error message tells you that the app is corrupted and cannot be opened and moved to the trash, while another rarer message tells you to download it again due to app corruption, and both are also solvable issues.
Did this solve the mistake for you? Did you find another solution or encounter another problem opening the Mac app? Share your experiences with us in the comments.
Friendly communicator. Music maven. Explorer. Pop culture trailblazer. Social media practitioner.