Using iOS-8.3, Xcode-6.3.1 and MacOS-10.10.3 - The CocoaPods (v0.37.1) installation of the RealmSwift (v0.92.3) described here and here basically works, except the WatchKit Exte
The Podfile above is actually the right one !!
However, it is important that you still "import RealmSwift" in your Realm-Object definition(s) using CocoaPods as can be seen in the corrected example below. This will make your error messages of the WatchKit Extension not recognizing any realm-object go away !
Also, if you intend to use your Realm-Object in two targets (i.e. "MyApp" and "MyApp WatchKit Extension"), make sure you select both the corresponding targets in the target selection pane of your RealmObject.swift file (see image below):