docs: rename "OS X" to "macOS"
gcsfuse has been tested successfully with the following operating systems:
* Linux (minimum kernel version 3.10)
-* OS X (minimum version 10.10.2)
+* macOS (minimum version 10.10.2)
It may or may not work correctly with other operating systems and older versions.
@@ -145,7 +145,7 @@ above and logging out and back in, you may need to fix the permissions:
[debian-bug]: http://superuser.com/a/800016/429161
-# OS X
+# macOS
The following describes how to install gcsfuse from homebrew. However, due to
the dependency on FUSE, homebrew is [deprecating
