Update getting-started-local-single-node.md (#3425)

Wget link for macos
diff --git a/website2/docs/getting-started-local-single-node.md b/website2/docs/getting-started-local-single-node.md
index 9a23a3e..5043a86 100644
--- a/website2/docs/getting-started-local-single-node.md
+++ b/website2/docs/getting-started-local-single-node.md
@@ -57,6 +57,10 @@
 and see a full listing of Heron releases for each available platform. The installation script for macOS (`darwin`), for example, is named
 `heron-install-{{% heronVersion %}}-darwin.sh`.
 
+```bash
+$ wget https://github.com/apache/incubator-heron/releases/download/{{% heronVersion %}}/heron-install-{{% heronVersion %}}-darwin.sh
+```
+
 Download the for your platform either from the releases page or using [`wget`](https://www.gnu.org/software/wget/). Here's a `wget` example for Ubuntu:
 
 ```bash
@@ -282,4 +286,4 @@
 * [Deploy topologies](deployment-overview) in clustered, scheduler-driven
   environments (such as on [Aurora](schedulers-aurora-cluster)
   and [locally](schedulers-local))
-* [Develop topologies](heron-architecture) for Heron
\ No newline at end of file
+* [Develop topologies](heron-architecture) for Heron