diff --git a/Installation.md b/Installation.md
index def2d6a..9f0f87f 100644
--- a/Installation.md
+++ b/Installation.md
@@ -7,6 +7,7 @@ To install JoeyLib, you will need the following:
   * MSI from and GIT access to [Golden Gate](https://juiced.gs/store/golden-gate/)
 * For building JoeyLib for macOS:
   * XIP file of [XCode 9.4.1](https://developer.apple.com/services-account/download?path=/Developer_Tools/Xcode_9.4.1/Xcode_9.4.1.xip) (Requires free Apple ID)
+  * A ridiculous amount of disk space (30+ gig free - seriously)
 
 From a shell prompt on your Linux system, enter: