Xbox One wireless controller is already supported on all Apple devices. You can connect your existing Xbox controller to the iPhone, iPad, iPod touch, Apple TV, or Mac and start enjoying the supported games. Right now, the following Xbox Controller models are supported.
- Xbox Wireless Controller with Bluetooth (Model 1708)
- Xbox Elite Wireless Controller Series 2
- Xbox Adaptive Controller
Apple is now working with Microsoft to bring compatibility for the Xbox Series X controller to customers in a future update.
Source: Apple