mac changes

setup.d/10-shellcheck.sh

@@ -1,6 +1,18 @@
 #!/bin/bash
 
 if ! command -v shellcheck > /dev/null; then
-    sudo apt update > /dev/null && sudo apt install shellcheck > /dev/null;
-    echo "Installed Shellcheck"
+    did_install=0
+    if [[ "$OSTYPE" == "linux-gnu"* ]]; then
+        sudo apt update > /dev/null && sudo apt install shellcheck > /dev/null;
+        did_install=1
+    elif [[ "$OSTYPE" == "darwin"* ]]; then
+        brew install shellcheck
+        did_install=1
+    fi
+
+    if [[ "$did_install" == 1 ]]; then
+        echo "Installed Shellcheck"
+    else
+        echo "Did NOT install Shellcheck"
+    fi
 fi