macOS will not open an app from outside the App Store: what to press

How to open it

1. Double-click the app. The system refuses: that is expected.
2. Open «System Settings» → «Privacy & Security».
3. At the bottom there is a line about the Shtil app and an «Open Anyway» button.
4. Press it and enter your Mac password. After that the app opens with a normal click, and the question does not come back.

Why it happens

The app is signed with our own key but not notarised by Apple: notarisation needs a paid developer account, which cannot be paid for from Russia. So macOS asks once.

The app finds updates by itself and installs only what is signed with our key.

If macOS says the app is damaged

Download the file again from shtil.vip/get and check that the build matches your processor: Apple or Intel. With Homebrew this question does not come up.