Mention required permissions in macos install

Author: Kuuuube

site/_wiki/Install/MacOS.md

@@ -8,6 +8,7 @@ hide_from_auto_list: true
 1. Download the [latest release]({{ site.data.links.project.latestRelease.osx-x64 }}) <small class="text-muted">(OpenTabletDriver.osx-x64.tar.gz)</small>
 2. Extract it and drag `{% otdexe macos-extractor %}` into your Applications folder
 3. Run the OpenTabletDriver app.
+4. Set up the [required permissions](https://opentabletdriver.net/Wiki/Documentation/RequiredPermissions#macos).
 
 ## Post-installation {#post-install}