I have a second hand Traktor kontrol s4 mk2 but my MacBook won't recognize it. I have Ventura 13.5.1 any help would be appreciated
Check if it has the latest Device update:
Device Updater 1.7.0 - Mac OS X Misc Info 23.07.2018 6.9MB
Also, please check this article here:
https://support.native-instruments.com/hc/en-us/articles/4410096148113-My-Native-Instruments-Hardware-Device-is-Not-Recognized
However keep in mind that "officially" is supported by Mac OS X 10.10 Yosemite, Mac OS X 10.8 Mountain Lion, Mac OS. I have no idea about Ventura. If this is the case, maybe you can find a solution in this article:
https://www.reddit.com/r/traktorpro/comments/zzfwbt/s4_mk2_wont_connect_to_macbook_with_ventura/
Yep, it's compatible:
https://support.native-instruments.com/hc/en-us/articles/360014900358-Compatibility-of-Native-Instruments-Products-on-macOS
Thanks to @LostInFoundation for pointing this out.