Thanks. But I get a "page not found" message when following that link.
From what I gather an USB device being "class compliant" means that it should at least partially work - have "basic functionality", on any OS, without a driver installed. Like most webcams for example.
Apparently the Saffire 6 USB 1.1 is not "class compliant" which seems to be part of the reason why there is no driver for it yet. I'm surprised that a "Class Compliant mode app" made it work for you, unless that app is somehow able to fake how the Saffire 6 is detected by the OS.
If this is how Focusrite is making our non-class compliant devices work with Mavericks, say hello to increased latency I guess.
I'm mad at myself for not having seen this coming, hardware doesn't just drop drastically in retail price or gets silently updated to "USB 2.0" for no reason. The Saffire 6 USB 1.1 is obvously obsolete and no longer supported by Focusrite.