Update – I updated to 10.12.6 and once again was unable to boot. Update – This has been an issue for myself and others running OS X Sierra as well. Update – It happened again when I updated to 10.11.4! Even fewer clues this time, additional details and an updated script to remove non-default kext files at the very bottom. Otherwise feel free to read the saga below! Choose Open.įrom now on when you double-click the app's icon, it will open normally.If your OS X El Capitan/Sierra/High Sierra update won’t reboot you can skip to the fix or check here for the (mostly) automated fix script. You will get another warning that the app is from an unidentified developer, but now you will have the option to open the app anyway. Right-click or Control-click on the app's icon.Ī contextual menu will appear. If you have downloaded software from a trusted source, and the app won't open due to being from an 'unidentified developer'), do this:

Instead you may want to deal with apps on an individual basis.

You can turn off this extra bit of security in System Preferences, but Gatekeeper (the software that keeps you from opening apps from unidentified developers) is trying to protect you from Trojan Horses and other malware. What it does mean is that you have to decide for yourself if you got it from a trustable source. This doesn't mean that the software you have downloaded is malware, or that it is from a dangerous source, or that it won't run on your Mac. As a default, if you download software from anywhere other than the Mac App Store or from developers who are Apple certified, you get a disconcerting message that the download is from an unidentified developer and it will be blocked. As of Mavericks (macOS 10.9), Apple instituted a new level of security via a built-in security program called GateKeeper.

Malwarebytes for el capitan