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diff --git a/misc/dotfiles/wireguard/onion-dns-up.sh b/misc/dotfiles/wireguard/onion-dns-up.sh
new file mode 100755
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--- /dev/null
+++ b/misc/dotfiles/wireguard/onion-dns-up.sh
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+#! /usr/bin/env sh
+
+# macOS as usual has it is own way to do DNS. Even when we set DNS in
+# WireGuard config, onion addresses will not be resolved anyway. Moreover,
+# nslookup (and probably other standard cli utilities will work properly), but
+# Firefox at the same time will not.
+# The only workaround I found it to set `SupplementalMatchDomains` manually
+# with `scutil`. This trick worked for OpenVPN for long time as well.
+
+iface=$1
+dns=$2
+
+scutil <<EOF
+d.init
+d.add ServerAddresses * $dns
+d.add SupplementalMatchDomains * onion
+set State:/Network/Service/$iface/DNS
+EOF