Note on missing brew

Author: helje5

README.md

@@ -14,11 +14,17 @@ Check the main project for details: [SwiftXcode](https://SwiftXcode.github.io).
 
 ### Install RxSwift Image
 
+TODO: formulate this:
+
 ```shell
 brew install swiftxcode/swiftxcode/swift-xcode-rxswift
 swift xcode link-templates # <-- important!
 ```
 
+You can install the image manually, but please note that for now the
+image will be for macOS, while the template is for iOS :-) The latter works
+fine though :-)
+
 ### Who
 
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