Our app and DMG files are notarized as Apple requires them for distributing apps outside of the Mac App Store. However, some people see an alert that the app or the DMG file can't be opened because Apple cannot check it for malicious software.
Prompt that app is malicious
If you see an alert like this, you should right-click on the app icon and select Open in the contextual menu. This will trigger another alert that asks you to open the app. Continue with Open to launch Raycast.
It seems that this is an issue on Apple's side. In particular Mojave doesn't reliably check the notarization of binaries.