From time to time you might have problems when after activating font in Font Reserve you still miss it in InDesign. As a mater of fact, you will miss these fonts in all Adobe applications.
As you can see from this example Garamond family is active including Garamond Light, but Light is not appearing in InDesign font menu. For that matter, Garamond Light would be missing from all Adobe applications including Illustrator, Photoshop etc. This is a sign of corrupted Adobe font caches.
To clean it up quit all Adobe programs (InDesign, Photoshop, Illustrator, Bridge etc.) quit Safari as well, because it might be using Adobe Acrobat Reader plugin.
Navigate to your Home Folder/Library/Caches/Adobe/ and delete following folders: Fonts, TypeSpt, TypeSupport. You might not have all three folders, so delete those that you have.
Restart your workstation. Relaunch your InDesign and now you should have all activated fonts available.