diff --git a/src/server/server.ts b/src/server/server.ts
index 9e2485a5505..14ca2ca6036 100644
--- a/src/server/server.ts
+++ b/src/server/server.ts
@@ -179,11 +179,11 @@ namespace ts.server {
                     basePath = os.homedir();
                     break;
                 case "darwin":
-                    basePath = combinePaths(os.homedir(), "/Library/Application Support/")
+                    basePath = combinePaths(os.homedir(), "Library/Application Support/")
                     break;
             }
             if (basePath) {
-                this.cachePath = combinePaths(normalizeSlashes(basePath), "/Microsoft/TypeScript");
+                this.cachePath = combinePaths(normalizeSlashes(basePath), "Microsoft/TypeScript");
             }
         }
 
diff --git a/src/server/typingsInstaller/typingsInstaller.ts b/src/server/typingsInstaller/typingsInstaller.ts
index 09df24544c7..73735d0741b 100644
--- a/src/server/typingsInstaller/typingsInstaller.ts
+++ b/src/server/typingsInstaller/typingsInstaller.ts
@@ -60,7 +60,8 @@ namespace ts.server.typingsInstaller {
             this.runTsd(req.cachePath, typingsToInstall, installedTypings => {
                 // TODO: record new missing package names
                 // TODO: watch project directory
-                installedTypings = installedTypings.map(x => getNormalizedAbsolutePath(x, req.cachePath));
+                const typingDirectory = combinePaths(req.cachePath, "typings");
+                installedTypings = installedTypings.map(x => combinePaths(typingDirectory, x));
                 this.sendResponse(this.createResponse(req, currentlyCachedTypings.concat(installedTypings)));
             });
         }