Ecler NUO 2 mixer connected to MacBook Pro?
The short answer: not without additional hardware.

To control Serato Scratch Live, you have to feed your computer some specially encoded signals from some special LPs that they produce. You need to buy Scratch Live, two or more of their special LPs (one for each deck) and then a special box like the Rane SL 2 for Scratch Live that sits between your mixer's mains output and your computer. This box converts the analog signal from the mixer (which, with the special Scratch Live LPs is not something you should try to listen to -- it's not human-friendly and can damage your speakers and hearing) in to a digital signal that Scratch Live uses to match the playback of audio on the computer, to the rotation of the LPs on your decks.