Looks like the update warning from Native Instruments a few weeks ago still hasn’t been completely resolved – the Traktor team sent out this message this morning to users warning them that even though the software side seems to be working fine on iOS7, the new Kontrol S4 and S2 MK2 hardware continues to have issues.
Here is a quick update on TRAKTOR DJ and iOS 7 compatibility: After extensive testing, we are pleased to inform you that TRAKTOR KONTROL Z1 is fully compatible with TRAKTOR DJ on iOS 7. The TRAKTOR DJ app is also working reliably under iOS 7, however Metadata sync with TRAKTOR PRO 2 is currently disabled by default.
The new TRAKTOR KONTROL S4 and S2 are fully compatible with TRAKTOR DJ 1.3 on iOS 6, however they are not currently supported under iOS 7. Native Instruments is working closely with Apple to solve the remaining issues and we expect to offer a solution in Q4 2013.