really surprised and somewhat disappointed that very basic, pared down digital audio is CRUSHING my new very expensive mac. Clean install, Sierra, maxed 2015 MBP. And 3 of the most popular DAW tools. That's all! Shouldn't it just work! I've been over everything and am no stranger to this. Should I return it and get the 2016? I mean, I've heard that Sierra had some problems with audio years ago. It's mature now. And my 2011 with Yosemite is performing the required task glitch-free. I've got 5 days till my 14 days are up. Put a lot of work and time dialing this machine in. Apple I love you!