Added Hint to Unpack the file (home-assistant#4584)

basst22778 · frenck · commit f4ac7feb2971 · 2018-02-08T21:52:05.000+01:00
Flashing will stop if you try to flash the .img.bz2 file directly on MacOS
diff --git a/source/hassio/installation.markdown b/source/hassio/installation.markdown
@@ -16,6 +16,8 @@ Hass.io images are available for all available Raspberry Pi and Intel NUC platfo
   - [Raspberry Pi 2][pi2]
   - [Raspberry Pi 3][pi3]
   - [Intel NUC][nuc]
+
+- Unpack the .bz2 File
 - Flash the downloaded image to an SD card using [Etcher].
 - Optional - Setup the WiFi or static IP: On the SD-card, edit the `system-connections/resin-sample` file and follow the [ResinOS howto][resinos-network].
 - Insert SD card to Raspberry Pi and turn it on. On first boot, it downloads the latest version of Home Assistant which takes ~20 minutes (slower/faster depending on the platform).
