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Many users have always met some difficulties in opening software on macOS. However, one of the most important new security features of the latest macOS Catalina is that it becomes much more difficult to run software from the internet than before. That’s to say, when you install MAC applications, plug-ins, and installer software from other ways (except for App Store), macOS will check the developer ID signature and notarization status to verify that the software is from a recognized developer and has not been changed.
Therefore, if you try to install an App from other ways, but you have set your Mac to allow Apps only from App Store, you will see the warning message below:
Also, if you try to install an app that isn’t signed by an identified developer, you will see another warning message that the app cannot be opened:
If you encounter these problems when installing Syncios, here is the solution for your reference:
① Find and go to System Preferences > Security & Privacy, and tap the General tab. Click the lock icon in the lower left corner of the screen and then enter your password to unlock Security & Privacy.
② Find and choose "App Store and identified developer" under "Allow apps downloaded from:" option.
③ Run Syncios now, you will see a warning message that says "Syncios app can't be opened...", just click "OK" option.
Syncios app won't be detected as malware again and you can open it on your Mac just as the authorized app.
What's more, some people will receive the message below, and you can simply solve it by two steps:
1. When you start to run Syncios, just click the “Show in Finder” button, then right-click (or hold control while you click) the procedure and choose “Open” option.
2. Now when the warning box comes back up you’ll have an option to “Open” and then the App will run just as the authorized app.
Haven't resolved your problem after trying above methods? Feel free to contact us via Email: [email protected]