No it’s not the OS (a Mac joke). A very sweet and flavorful tea. Light and refreshing on the palate. Dispels the myth, that you can’t drink tea on a hot day( it was 85 today). Prepped in glass gaiwan, I like to watch the leaves “dance” as the open up. Kept water at 170 degrees, 2 teaspoons , 6 oz gaiwan yielded 4 steepings.