I've been reading several forums and it seems 10.11 is really messing up audio production in general. Apogee, Line 6 (especially!), Native Instruments, you name it. I've read reports of audio dropouts, crackling, audio pops - basically just unworkable. I thought it was something to do with my interface but it seems no matter what I buy as a USB audio interface, there is a very high chance of it not working due to the OS.
--> I bought a Mac because I wanted LESS hassle and to PLAY more! But it turns out I was better off on my Windows machine.
Very disappointing. I'm seriously considering handing this back and buying a Windows machine with my £2000. What am I supposed to do? Wait in hope that this is all going to work out? I can't use the machine for the purpose I bought it for. A real shame as otherwise I like it - VERY unhappy with this. I'm going to look at alternative Windows machines now. Unless this is solved rapidly, Apple just lost themselves a customer for life, and £2000 is leaving their account. I only just switched to Apple as everybody was saying how I had to get one because they're so great for AV work but I've never seen any issue like this on my old Windows machine. I've never spent so much time faffing around trying to find out what the issue is. I was looking at upgrading to an expensive Apogee unit and that would have been a massive waste of money.
SO gutted as I like the machine otherwise.