The HooToo USB 3.0 hub is an awesome USB hub that I use with my iMac. It’s super slim and fits great up in under my desk. So far it has been very reliable, not cutting out at all. For the price I would very much recommend them. Let me know if you have any questions about it.

HooToo® HT-UH006 USB 3.0 Hub 7-Port Bus-Powered