To be clear, the “Allow applications downloaded from anywhere” option is hidden by default in Gatekeeper for macOS Sierra. You can see this by going to the Security & Privacy preference panel, and under the “General” section you will not find such an option for Gatekeeper app allow settings. Despite that, with a little command line intervention you can reveal the third option and regain the ability to open apps that come from anywhere. Atau kalau komputer Mac anda settingan bahasanya bahasa Inggris “Allow apps downloaded from: Anywhere” Tetapi tidak seperti versi Mac OS X sebelumnya, di macOS Sierra dan High Sierra sedikit memiliki pengaturan keamanan yang berbeda di defaultnya. Gatekeeper on macOS High Sierra is defaulting to only allow options for apps downloaded from App Store and identified developers. But many users hope to get the apps downloaded from anywhere on the version of macOS High Sierra. Oct 12, 2017 Running into issues installing downloaded apps on your Mac in Sierra or High Sierra?

macOS High Sierra is a great update and brings lots of new and much needed improvements but that doesn’t mean that some of the changes can’t be annoying.

For example, just like in macOS Sierra, one of the changes that Gatekeeper comes with is that there’s no immediate way to allow unsigned apps to open.

Up until now, Gatekeeper also allowed you to open apps downloaded from “Anywhere” but that’s no longer the case. Of course you can still open unsigned apps, but it’s a pain in the ass.

Let’s say you want to open a free app like Audacity. Open it and you will get this pop-up…

Ok, nothing new here. This was present in previous OS X version too. However, in previous versions you always had the option to set OS X and allow unsigned apps from “Anywhere”.

In macOS High Sierra that option is missing and, you will always have to go to System Preferences>Security & Privacy> and click on a new button that says “Open Anyway”.

Luckily there’s an easy fix for this:
1. Open up Terminal, type “sudo spctl –master-disable”( no quotes ), and hit enter ( NOTE: you might not be able to copy – paste the command in the terminal. See the screenshot below to make sure you enter it correctly )

Allow Apps Downloaded From Anywhere Mac Sierra 10.13

2. Type in your password ( you won’t be able to see what you’re typing ), and hit enter

3. You’re done.

Allow Apps Downloaded From Anywhere Mac Sierra 10.12

Allow Apps Downloaded From Anywhere Mac Sierra 10.12

Now you can go to Preferences>Security & Privacy and choose “Anywhere”

NOTE: if you want, for some reason, to go back to the way macOS High Sierra wants it all you have to do is repeat all the steps above but instead of “disable” change it to “enable”. ( i.e. “sudo spctl –master-enable” )