I don't think Shazam needs an introduction but, if you still don't know what it is; it's a service that identifies music and some TV shows just by listening. It's quite fascinating the first time you see it in action — especially popular songs that the algorithm can figure out just by hearing 2 seconds of the intro.
As a mobile only service for many years, getting Shazam on a Mac is exciting news. The Mac app just sits in the menu bar listening and identifying any music it hears. The always on feature was introduced to mobile a while ago but I never really enabled it for obvious battery life concerns. Now that it's on Mac, I'm willing to give 'always on' a try. Interestingly, there doesn't appear to be a simple 'Shazam-ing' button — it's either always on or always off.
There isn't much to point out here but, syncing with other devices would be great. Shazam has always served a secondary purpose for me besides the whole identification aspect. As someone who loves music, Shazam was sort of a to-do list for songs I wanted to listen to, so not having access to my iPhone tags on my Mac is huge.
Get Shazam for Mac