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I had a non-Apple app previously installed on my MacBook Air but it got erased at some point. Now when I try to reinstall, it won't let me. It's not available in the App Store so I'm downloading from the vendor site...which is exactly how I got it last time. But the Mac blocks the install every time.
MacBook Air 13", macOS 10.14
Hi! Thanks for suggesting this. Unfortunately, neither action worked. I still get a message box that gives me the option of canceling or moving the install file to trash.
You need to go into the Security System Preferences and "allow" the app to run (there should be a button at the bottom right of the window). Or you can Control click on the app and select "Open" while holding the Control key. This will alert you that you are installing/running a potentially dangerous app and macOS will ask for your admin password to allow the app to run. You should only have to do this the first time you run the app.
If the "app" is a .pkg file or other type of installer, then this is normal behavior once the .pkg installer file has been run. If it is a .pkg file, then it will install the actual application which most likely is located in the "Applications" folder. When you run the app from the Applications folder for the first time you may need to approve it in the Security System Preferences or Control-click to open the app as I described previously.
Override app install security
