[odbol]

El Crapitan has so many problems it's ridiculous. They broke not only all kinds of Open Source software with their overly paranoid system protection, but also a bunch of hardware by messing up the USB drivers. There are now tons of musical instruments, Arduinos, and other USB devices that don't work with El Crapitan. Apple's response was: ... there was no response.

Us hardware manufacturers are still looking for a fix. Our customers are angry at us and blaming us, and we can't do anything. There's no way for our customers to even tell Apple what's wrong, either.

[VonGuard]

USB Overdrive is as close as you'll get to a solution. This is the company that can't even make iTunes usable with 16 years of work.