diff --git a/platform/util/src/com/intellij/util/lang/ClassPath.java b/platform/util/src/com/intellij/util/lang/ClassPath.java
index ccfbc4cd9cf1..92151d9c071e 100644
--- a/platform/util/src/com/intellij/util/lang/ClassPath.java
+++ b/platform/util/src/com/intellij/util/lang/ClassPath.java
@@ -205,7 +205,7 @@ class ClassPath {
     }
     else {
       JarLoader jarLoader = new JarLoader(url, myCanLockJars);
-//      jarLoader.preLoadClasses();
+      jarLoader.preLoadClasses();
       loader = jarLoader;
     }
 
diff --git a/platform/util/src/com/intellij/util/lang/JarLoader.java b/platform/util/src/com/intellij/util/lang/JarLoader.java
index 318cf0ba4050..7e8417752caa 100644
--- a/platform/util/src/com/intellij/util/lang/JarLoader.java
+++ b/platform/util/src/com/intellij/util/lang/JarLoader.java
@@ -75,6 +75,9 @@ class JarLoader extends Loader {
         releaseZipFile(zipFile);
       }
     }
+    catch (FileNotFoundException e) {
+      // it happens :) eg tools.jar under MacOS
+    }
     catch (Exception e) {
       LOG.error(e);
     }