Add apple verification error to macos faq

Author: Kuuuube

site/_wiki/FAQ/MacOS.md

@@ -7,6 +7,10 @@ hide_from_auto_list: true
 first before continuing.
 {:.alert-primary}
 
+## Apple could not verify "OpenTabletDriver" {#apple-verification}
+
+Follow the steps in [Apple's Documentation](https://support.apple.com/guide/mac-help/open-a-mac-app-from-an-unknown-developer-mh40616/mac) for your MacOS version.
+
 ## Cursor doesn't respond to tablet input {#cursor-not-moving}
 
 See [here]({% link _wiki/Documentation/RequiredPermissions.md %}#macos).