I wish I had read something like this before trying to hook my Helix up to my Mac.
1. Helix 1.03 DOES NOT WORK with USB on a Mac with El Capitan OS (10.10.5). Also, the Helix does not work with USB less than 2.0.
The Helix will show up under USB in "system information" and the Helix app will "see" the Helix but won't be able to read from it or write to it.
Line 6 says they'll fix that in a future update but if you can't connect your Helix to your Mac, you won't be able to upgrade.
2. So....using "Time Machine", I reverted to the previous Mac OS ("Yosemite"). It took 10 hours to revert!!!
THAT WORKED!!!
3. I expected to see Helix listed among the connected USB devices in Finder. Nope. The only place I've found to "see" the Helix is using the Helix App. But that's all I wanted.
4. The Helix is way cooler than is possible to describe. Yow! If you play electric guitar, you want this.