You can send iMessages from Mavericks, which is great, but I was getting fed up of having a shadow person as my profile picture.
To change this just click on the Messages menu, next to the Apple icon in the menu bar.
One of my favourite new features of Mavericks is the ability to direct all audio output from your computer to Airplay enabled speakers. Meaning at last that I can “throw” Spotify onto my airplay speakers without having to use my iDevice.
So you want to do this – well one way is to go into preferences, open sound, choose output and select in there. That’s a bit long winded, why not just use this shortcut…
Hold down the option (alt) key while clicking on the speaker icon in the menu bar and it will bring up a list of all devices that you can send your audio output to.
Select the ones you want and hey presto.