diff --git a/README.md b/README.md
index 432bc1e..3f2cd21 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,18 @@ Better instructions will be available in the future, but for now, here's how to
 Run `jumpstart.sh` to get some basic installation media for macOS.
 
 ## Step 2 
-Run `basic.sh` to start the machine and install macOS.
+Create an empty hard disk using `qemu-img`
+```
+qemu-img create -f qcow2 MyDisk.qcow2 64G
+```
+
+and add it to the end of `basic.sh`
+```
+    -drive id=SystemDisk,if=none,file=MyDisk.qcow2 \
+    -device ide-hd,bus=sata.4,drive=SystemDisk \
+```
+
+Then run `basic.sh` to start the machine and install macOS.
 
 ## Step 3
-Look at the `docs` folder for more information on adding passthrough hardware, set up tunnel networking, and enable sound features.
\ No newline at end of file
+Look at the `docs` folder for more information on adding passthrough hardware, set up tunnel networking, and enable sound features.