diff --git a/docs/platform-hyperkit.md b/docs/platform-hyperkit.md
index 483207bcf..9fcb3ce57 100644
--- a/docs/platform-hyperkit.md
+++ b/docs/platform-hyperkit.md
@@ -31,6 +31,12 @@ The HyperKit backend support configuring a persistent disk using the
 standard `linuxkit` `-disk` syntax.  Currently, only one disk is
 supported and the disk is in raw format.
 
+## Power management
+
+HyperKit sends an ACPI power event when it receives SIGTERM to allow the VM to
+shut down properly. The VM has to be able to receive ACPI events to initiate the
+shutdown.  This is provided by the [`acpid` package](../pkg/acpid). An example
+is available in the [Docker for Mac blueprint](../blueprints/docker-for-mac/base.yml).
 
 ## Networking